Olivia Newton-John slams false reports and 'exaggerated' illness rumors in new video

Olivia Newton-John is looking happy and healthy amid tabloid reports that she's on the brink of death.

The actress, who is in the midst of a battle with cancer, took to Facebook on Wednesday to respond to rumors that her body is "shutting down" and that she has only weeks to live. In fact, the Grease star seemed to be in very high spirits while setting the record straight about her health.

"Happy New Year, everyone! This is Olivia Newton John, and I just want to say that the rumors of my death have been greatly exaggerated, to quote the famous quote," the 70-year-old star said with a laugh, paraphrasing the famous quip commonly attributed to Mark Twain.

"I'm doing great and I want to wish all of you the happiest, healthiest 2019 that is possible," she continued. "Thank you all for your wonderful love and support, for me and for my Olivia Newton John Cancer Wellness Center in Melbourne, Australia. Thank you so much!"

Newton-John's comments come hours after her family took to social media to shoot down the speculation as well.

RELATED: See photos of Olivia Newton-John and her daughter

14 PHOTOS
Olivia Newton-John and daughter through the years
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Olivia Newton-John and daughter through the years
LOS ANGELES, CALIFORNIA - APRIL 01: Singer Olivia Newton-John and her daughter Chloe Lattanzi on the red carpet for the Premiere of Syfy's 'Dead 7' at Harmony Gold on April 1, 2016 in Los Angeles, California. (Photo by Paul Redmond/WireImage)
LOS ANGELES, CALIFORNIA - APRIL 01: Singer Olivia Newton-John and her daughter Chloe Lattanzi on the red carpet for the Premiere of Syfy's 'Dead 7' at Harmony Gold on April 1, 2016 in Los Angeles, California. (Photo by Paul Redmond/WireImage)
DANCING WITH THE STARS - 'Episode 2106' - The remaining nine celebrities returned to their original professional dance partners to tackle 'Famous Dances Night' on MONDAY, OCTOBER 19 (8:00-10:01 p.m., ET) on ABC's 'Dancing with the Stars.' Special guest Olivia Newton-John joined the judges' desk to see how the couples re-created iconic dance routines from movies and music videos. One couple was eliminated at the end of the night based on the lowest combined judges' scores and viewer's votes from the 'Switch Up' and 'Most Memorable Year' performances. (Photo by Adam Taylor/ABC via Getty Images) OLIVIA NEWTON-JOHN, CHLOE LATTANZI
LAS VEGAS, NV - AUGUST 09: Singer Chloe Lattanzi (L) and her mother, singer/actress Olivia Newton-John celebrate the 35th anniversary of 'Xanadu' with the world premiere of their music video 'You Have to Believe' at Share Nightclub on August 9, 2015 in Las Vegas, Nevada. (Photo by Bryan Steffy/WireImage)
Olivia Newton-John and daughter Chloe Lattanzi attend the 2011 G'Day USA Los Angeles black tie gala at The Hollywood Palladium on January 22, 2011 in Los Angeles, California.
Singer Olivia Newton-John and daughter Chloe Lattanzi attend the 'Mamma Mia!' Opening Night Performance on February 26, 2001 at the Shubert Theatre in Century City, California. (Photo by Ron Galella, Ltd./WireImage)
Singer Olivia Newton-John and daughter Chloe Lattanzi attend the 27th Annual American Music Awards on January 17, 2000 at Shrine Auditorium in Los Angeles, California.
Actress Chloe Lattanzi and singer/actress Olivia Newton-John attend 'Score: A Hockey Musical' premiere during the 35th Toronto International Film Festival at Roy Thomson Hall on September 9, 2010 in Toronto, Canada.
Singer Olivia Newton-John and daughter Chloe Lattanzi attend the 27th Annual American Music Awards on January 17, 2000 at Shrine Auditorium in Los Angeles, California. (Photo by Ron Galella, Ltd./WireImage)
(EXCLUSIVE, Premium Rates Apply) Olivia Newton-John and daughter Chloe Lattanzi (Photo by Barry King/WireImage)
Chloe Lattanzi and mom Olivia Newton-John during G'Day LA: Australia Week 2006 - Penfolds Icon Gala Dinner - Arrivals in Los Angelees, California, United States. (Photo by Gregg DeGuire/WireImage)
PACIFIC PALISADES, CA - NOVEMBER 2: Singer Olivia Newton-John and daughter Chloe Lattanzi attend the Seventh Annual Environmental Media Awards on November 2, 1997 at the Will Rogers State Park in Pacific Palisades, California. (Photo by Ron Galella, Ltd./WireImage)
UNIVERSAL CITY, CA - MARCH 17: Singer Olivia Newton-John, husband Matt Lattanzi and daughter Chloe Lattanzi attend the 'Teenage Mutant Ninja Turtles II: The Secret of the Ooze' Universal City Premiere on March 17, 1991 at Cineplex Odeon Universal City Cinemas in Universal City, California. (Photo by Ron Galella, Ltd./WireImage)
UNITED STATES - JUNE 11: Olivia Newton-John and her daughter Chloe, 4, toured the United Nations after mom was named an ambassador for the organization's environmental programs. Among Olivia's duties: Leading a celeb safari in Nairobi this August and attending a conference in Brazil in 1992. (Photo by Richard Corkery/NY Daily News Archive via Getty Images)
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Her niece, Tottie Goldsmith, took to Instagram on Wednesday to address the alarming reports. "Just giving you the heads up that Livvy is in good health, so let’s leave that distressing rumor where it belongs," Goldsmith wrote.

Meanwhile, Newton-John's manager, Michael Caprio, denied the reports to The Daily Mail, calling them "hilarious."

Last September, Newton-John revealed she's battling cancer for the third time after doctors discovered a tumor at the base of her spine. 

She was first diagnosed with breast cancer in 1992. She beat the disease after months of chemotherapy treatments and a partial mastectomy but revealed in May 2017 that the breast cancer had returned, spreading to her shoulder.

ET spoke to Newton-John last February at a benefit concert to help those affected by wildfires in Santa Barbara, California, before she revealed her third battle with cancer.

"I've been great," she said about her health at the time. "Yeah, I feel really good." Watch the video below to hear more.

28 PHOTOS
Olivia Newton-John out and about
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Olivia Newton-John out and about
ATLANTA, GA - APRIL 09: Olivia Newton-John performs at Cobb Energy Centre on April 9, 2017 in Atlanta, Georgia. (Photo by Chris McKay/Getty Images)
LAS VEGAS, NV - MARCH 23: Executive producer Al Bowman (L) and entertainer Olivia Newton-John, recipient of the Las Vegas Icon award, pose with her trophy during the inaugural Las Vegas F.A.M.E (Film, Art, Music and Entertainment) Awards presented by the Producers Choice Honors at the Hard Rock Cafe Las Vegas Strip on March 23, 2017 in Las Vegas, Nevada. (Photo by Gabe Ginsberg/FilmMagic)
HOLLYWOOD, CA - NOVEMBER 27: Actress / Singer Olivia Newton-John attends the 85th Annual Hollywood Christmas Parade on November 27, 2016 in Hollywood, California. (Photo by Paul Archuleta/FilmMagic)
LONDON, ENGLAND - JANUARY 26: Olivia Newton-John performs at the Union Chapel on January 26, 2017 in London, England. (Photo by Imelda Michalczyk/Redferns)
NASHVILLE, TN - NOVEMBER 02: (L-R) Hayley Orrantia, Olivia Newton-John, and Wendi McLendon-Covey appear onstage during the 50th annual CMA Awards at the Bridgestone Arena on November 2, 2016 in Nashville, Tennessee. (Photo by Taylor Hill/Getty Images)
LAS VEGAS, NV - OCTOBER 23: Entertainer Olivia Newton-John (L) and Singer Steve Real perform at a 'Turn Up the Pink' champagne brunch benefiting Making Strides Las Vegas to raise awareness and support for breast cancer research as part of the Hard Rock Cafe's Hard Rock Heals global charitable initiative at the Hard Rock Cafe Las Vegas Strip on October 23, 2016 in Las Vegas, Nevada. (Photo by Gabe Ginsberg/Getty Images)
NASHVILLE, TN - NOVEMBER 02: John Easterling and singer-songwriter Olivia Newton-John attend the 50th annual CMA Awards at the Bridgestone Arena on November 2, 2016 in Nashville, Tennessee. (Photo by Taylor Hill/Getty Images)
LAS VEGAS, NV - OCTOBER 23: Entertainer Olivia Newton-John attends 'Turn Up the Pink' champagne brunch benefiting Making Strides Las Vegas to raise awareness and support for breast cancer research as part of the Hard Rock Cafe's Hard Rock Heals global charitable initiative at the Hard Rock Cafe Las Vegas Strip on October 23, 2016 in Las Vegas, Nevada. (Photo by Gabe Ginsberg/Getty Images)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0547 -- Pictured: Singer Olivia Newton-John with The Roots on October 4, 2016 -- (Photo by: Andrew Lipovsky/NBC/NBCU Photo Bank via Getty Images)
TODAY -- Pictured: (l-r) Anchors Hoda Kotb and Kathie Lee Gifford with Olivia Newton-John on Tuesday, October 4, 2016 -- (Photo by: Heidi Gutman/NBC NewsWire via Getty Images/NBCU Photo Bank via Getty Images)
NEW YORK, NY - OCTOBER 04: Singer-songwriter/actress Olivia Newton-John attends the 'Divorce' New York Premiere at SVA Theater on October 4, 2016 in New York City. (Photo by Gilbert Carrasquillo/FilmMagic)
WATCH WHAT HAPPENS LIVE -- Pictured (l-r): Cynthia Nixon and Olivia Newton-John -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
WATCH WHAT HAPPENS LIVE -- Pictured: Olivia Newton-John -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
NEW YORK, NY - OCTOBER 04: Sarah Jessica Parker and Olivia Newton-John attend 'Divorce' New York Premiere on October 4, 2016 in New York City. (Photo by Astrid Stawiarz/Getty Images)
NEW YORK, NY - OCTOBER 03: Singer Olivia Newton-John attends The Build Series Presents Olivia Newton-John, Amy Sky And Beth Nielsen Chapman to discuss The New Project 'LIV ON' at AOL HQ on October 3, 2016 in New York City. (Photo by Desiree Navarro/WireImage)
NEW YORK, NY - OCTOBER 03: Singers Olivia Newton-John and Melissa Etheridge visit the SiriusXM Studio on October 3, 2016 in New York City. (Photo by Cindy Ord/Getty Images)
LOS ANGELES, CA - MAY 21: Olivia Newton-John arrives for the Steve Irwin Gala Dinner at JW Marriott Los Angeles at L.A. LIVE on May 21, 2016 in Los Angeles, California. (Photo by Gabriel Olsen/FilmMagic)
LOS ANGELES, CA - MAY 21: Bindi Irwin (L) and Olivia Newton-John arrive for the Steve Irwin Gala Dinner at JW Marriott Los Angeles at L.A. LIVE on May 21, 2016 in Los Angeles, California. (Photo by Gabriel Olsen/FilmMagic)
ATLANTIC CITY, NJ - APRIL 22: Olivia Newton-John appears in concert in the Arena at Trump Taj Mahal on April 22, 2016 in Atlantic City, New Jersey. (Photo by Donald Kravitz/Getty Images)
LAS VEGAS, NV - JANUARY 23: Olivia Newton-John and Nevada Ballet Theatre's Future Dance students during Nevada Ballet Theater's 32nd Annual Black & White Ball honoring Olivia Newton-John at Wynn Las Vegas on January 23, 2016 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
LOS ANGELES, CALIFORNIA - APRIL 01: Singer Olivia Newton-John and her daughter Chloe Lattanzi on the red carpet for the Premiere of Syfy's 'Dead 7' at Harmony Gold on April 1, 2016 in Los Angeles, California. (Photo by Paul Redmond/WireImage)
LAS VEGAS, NV - JANUARY 23: Chippendsales dancers Ryan Stuart and James Davis pose for a photo with Leeza Gibbons (L) and Olivia Newton-John (2nd from R), at Nevada Ballet Theater's 32nd Annual Black & White Ball at Wynn Las Vegas on January 23, 2016 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
LAS VEGAS, NV - JANUARY 23: Entertainer Olivia Newton-John (R) and her husband, John Easterling, attend Nevada Ballet Theatre's 32nd annual Black & White Ball honoring her at Wynn Las Vegas on January 23, 2016 in Las Vegas, Nevada. (Photo by David Becker/Getty Images)
DANCING WITH THE STARS - 'Episode 2106' - The remaining nine celebrities returned to their original professional dance partners to tackle 'Famous Dances Night' on MONDAY, OCTOBER 19 (8:00-10:01 p.m., ET) on ABC's 'Dancing with the Stars.' Special guest Olivia Newton-John joined the judges' desk to see how the couples re-created iconic dance routines from movies and music videos. One couple was eliminated at the end of the night based on the lowest combined judges' scores and viewer's votes from the 'Switch Up' and 'Most Memorable Year' performances. (Photo by Adam Taylor/ABC via Getty Images) OLIVIA NEWTON-JOHN
LAS VEGAS, NV - AUGUST 09: Singer Chloe Lattanzi (L) and her mother, singer/actress Olivia Newton-John celebrate the 35th anniversary of 'Xanadu' with the world premiere of their music video 'You Have to Believe' at Share Nightclub on August 9, 2015 in Las Vegas, Nevada. (Photo by Bryan Steffy/WireImage)
LAS VEGAS, NV - AUGUST 09: (EXCLUSIVE COVERAGE) (L-R) John Easterling, and his wife, singer/actress Olivia Newton-John, daughter, singer Chloe Lattanzi and her fiance James Driskill attend the celebration of the 35th anniversary of 'Xanadu' with the world premiere of their music video 'You Have to Believe' at Share Nightclub on August 9, 2015 in Las Vegas, Nevada. (Photo by Bryan Steffy/WireImage)
LAS VEGAS, NV - MARCH 07: Entertainer Olivia Newton-John arrives at the 6th annual St. Baldrick's Foundation Head-Shaving Fundraiser at the New York-New York Hotel & Casino on March 7, 2015 in Las Vegas, Nevada. (Photo by Gabe Ginsberg/FilmMagic)
LAS VEGAS, NV - JANUARY 03: Entertainer Olivia Newton-John (L) and actress Didi Conn appear after they performed 'Summer Nights' together at Flamingo Las Vegas on January 3, 2015 in Las Vegas, Nevada. (Photo by David Becker/WireImage)
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