Kristen Bell helps teen with 'Frozen'-themed promposal on 'Jimmy Kimmel Live!'



It was the promposal to end all promposals.

While filling in as host on Jimmy Kimmel Live! Thursday, Kristen Bell helped a teen ask his classmate to prom by singing an altered version of the hit Frozen song, 'Do You Want to Build a Snowman?'

"Do you want to be his prom date and go with Michael to the prom?" Bell sang for Sarah, who had no idea that she would be center stage at the taping she and her family attended.

Sarah had been sent out to Hollywood Boulevard in Los Angeles wearing an 'Anna' costume, tasked with finding a masked 'Kristoff' on the street.

"Now to make things more dramatic, Sarah and Michael have never been on a date before," Bell said while Sarah was out searching. "Sarah has no idea Michael is asking her to prom. This could go terribly wrong, but you've got to admit it would make great TV, right?"

Read: Emma Stone Responds To Teen Who Asked Her To Prom In Epic Video

The teen found the character and when she brought him back to the studio, she was surprised to find her classmate Michael in the suit.

"Sarah, there's something I wanted to ask you, but I didn't know the words, so Kristen Bell is going to help me," Michael said.

Stunned, Sarah turned to face Bell, who said: "Sarah, I want you to think about this. Don't answer until I'm done singing."

Read: Girl With Down Syndrome Will Take Helicopter To Dance After Doritos Promposal

To the tune of 'Do You Want to Build a Snowman?' Bell sang: "Do you want to be his prom date and go with Michael to the prom? Michael wants so much for you to go, because if you say no, he'll have to take his mom. He knows you're just school buddies, but what the f***, he thinks you're really cute.

"He's asking you to be his prom date, in front of millions of people," Bell continued. "If you say no this will be awkward..."

Sarah interrupted at that point, giggling as she grabbed the mic and said, "Yes!"

Bell set the pair up with a limousine on the big day, as weel as a glam session to help Sarah get ready and a tuxedo fitting for Michael.

"And a case of beer! I'm just kidding about the beer," Bell quipped. "Congratulations!"

Watch: College Students Create 'Frozen'-Themed Prosthetic Arm for 9-Year-Old Girl

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Kristen Bell takes her #CleanPledge with Tide purclean ahead of Earth Day.

(Credit: StarTraks)

NEW YORK, NY - MARCH 23: Actress Kristen Bell is seen walking in Midtown on March 23, 2017 in New York City. (Photo by Raymond Hall/GC Images)
THE VIEW - 3/23/17 Guests include Kristen Bell and Dax Shepard; Rep. Adam Schiff (via satellite) on ABC's 'The View.' 'The View' airs Monday-Friday (11:00 am-12:00 pm, ET) on the ABC Television Network. (Photo by Paula Lobo/ABC via Getty Images) KRISTEN BELL
LATE NIGHT WITH SETH MEYERS -- Episode 506 -- Pictured: (l-r) Actress Kristen Bell during an interview with host Seth Meyers on March 22, 2017 -- (Photo by: Lloyd Bishop/NBC/NBCU Photo Bank via Getty Images)
NEW YORK, NY - MARCH 22: Actors Dax Shepard and Kristen Bell visit the SiriusXM Studios on March 22, 2017 in New York City. (Photo by Cindy Ord/Getty Images)
HOLLYWOOD, CA - MARCH 20: Actors Dax Shepard and Kristen Bell arrive at the premiere of Warner Bros. Pictures' 'CHIPS' at TCL Chinese Theatre on March 20, 2017 in Hollywood, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
HOLLYWOOD, CA - MARCH 20: Actress Kristen Bell arrives at the premiere of Warner Bros. Pictures' 'CHiPS' at TCL Chinese Theatre on March 20, 2017 in Hollywood, California. (Photo by Gregg DeGuire/WireImage)
LOS ANGELES, CA - MARCH 04: Hosts Maria Gabriel, Stylist Ilaria Urbinati, Simon Kinberg, Rachel Bilson, Kristen Bell, Josh Schwartz and Jill Schwartz attend an Evening To Benefit The ACLU Of Southern California on March 4, 2017 in Los Angeles, California. (Photo by Todd Williamson/Getty Images)
LOS ANGELES, CA - MARCH 04: Rachel Bilson and Kristen Bell attend An Evening To Benefit The ACLU Of Southern California on March 4, 2017 in Los Angeles, California. (Photo by Todd Williamson/Getty Images)
LOS ANGELES, CA - JANUARY 18: Actress Kristen Bell arrives at People's Choice Awards 2017 at Microsoft Theater on January 18, 2017 in Los Angeles, California. (Photo by Allen Berezovsky/Getty Images for Fashion Media)
LOS ANGELES, CA - JANUARY 18: Actress Kristen Bell (L) and recording artist/TV personality Gwen Stefani attend the People's Choice Awards 2017 at Microsoft Theater on January 18, 2017 in Los Angeles, California. (Photo by Christopher Polk/Getty Images for People's Choice Awards)
BEVERLY HILLS, CA - JANUARY 08: Actress Kristen Bell attends the 74th Annual Golden Globe Awards held at The Beverly Hilton Hotel on January 8, 2017 in Beverly Hills, California. (Photo by George Pimentel/WireImage)
LOS ANGELES, CA - JANUARY 07: Actress Kristen Bell arrives at The Art of Elysium celebrating the 10th Anniversary at Red Studios on January 7, 2017 in Los Angeles, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
NBCUNIVERSAL EVENTS -- 'Universal Television TCA Studio Day' -- Pictured: Kristen Bell; The cast and creator of 'The Good Place' gather on the Universal Studios backlot for Universal Television's TCA Studio Day events on Friday, January 6, 2017 -- (Photo by: Evans Vestal Ward/NBC/NBCU Photo Bank via Getty Images)
LOS ANGELES, CA - NOVEMBER 18: Actors Ted Danson (L) and Kristen Bell attend SAG-AFTRA Foundation's Conversations with 'The Good Place' at SAG-AFTRA Foundation Screening Room on November 18, 2016 in Los Angeles, California. (Photo by Vincent Sandoval/Getty Images)
LOS ANGELES, CA - NOVEMBER 13: Kristen Bell attends The Grove Christmas With Seth MacFarlane at The Grove on November 13, 2016 in Los Angeles, California. (Photo by Tommaso Boddi/WireImage)
CULVER CITY, CA - NOVEMBER 12: Actors Dax Shepard (L) and Kristen Bell arrive at the 5th Annual Baby2Baby Gala at 3LABS on November 12, 2016 in Culver City, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
PACIFIC PALISADES, CA - OCTOBER 15: Actress Kristen Bell attends the 7th Annual Veuve Clicquot Polo classic at Will Rogers State Historic Park on October 15, 2016 in Pacific Palisades, California. (Photo by Paul Archuleta/WireImage for Fashion Media )
Kristen Bell arrives for the 68th Emmy Awards on September 18, 2016 at the Microsoft Theatre in Los Angeles. / AFP / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
THE GOOD PLACE -- 'Michael's Gambit' Episode 113 -- Pictured: (l-r) Ted Danson as Michael, Kristen Bell as Eleanor Shellstrop -- (Photo by: Vivian Zink/NBC/NBCU Photo Bank via Getty Images)
LOS ANGELES, CA - AUGUST 14: Rashida Jones and Kristen Bell attend the Jen Klein Day of Indulgence 2016 on August 14, 2016 in Los Angeles, California. (Photo by Amy Graves/WireImage)
THE GOOD PLACE -- 'Mindy St. Claire' Episode 112 -- Pictured: (l-r) Kristen Bell as Eleanor Shellstrop, D'Arcy Carden as Janet Della-Denunzio -- (Photo by: Vivian Zink/NBC/NBCU Photo Bank via Getty Images)
NBCUNIVERSAL EVENTS -- NBCUniversal Press Tour Portraits, AUGUST 02, 2016: (L-R) Actors William Jackson Harper, Kristen Bell, D'Arcy Carden, Ted Danson, Manny Jacinto, and Jameela Jamil of 'The Good Place' pose for a portrait in the the NBCUniversal Press Tour portrait studio at The Beverly Hilton Hotel on August 2, 2016 in Beverly Hills, California. (Photo by Christopher Polk/NBC/NBCU Photo Bank via Getty Images)
BEVERLY HILLS, CA - AUGUST 02: Actors Kristen Bell (L) and Ted Danson from NBCUniversal's 'The Good Place' pose for a portrait at the 2016 Summer TCAs Getty Images Portrait Studio at the Beverly Hilton Hotel on August 2, 2016 in Beverly Hills, California. (Photo by Maarten de Boer/Getty Images)
THE GOOD PLACE -- 'Chidi's Choice' Episode 110 -- Pictured: Kristen Bell as Eleanor -- (Photo by: Ron Batzdorff/NBC/NBCU Photo Bank via Getty Images)
WESTWOOD, CA - JULY 26: Actress Kristen Bell arrives at the premiere of STX Entertainment's 'Bad Moms' at Mann Village Theatre on July 26, 2016 in Westwood, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
WESTWOOD, CA - JULY 26: Actors Mila Kunis (L) and Kristen Bell attend the Premiere of STX Entertainment's 'Bad Moms' at Mann Village Theatre on July 26, 2016 in Westwood, California. (Photo by Allen Berezovsky/Getty Imagesfor Fashion Media)
LOS ANGELES, CA - JULY 19: Kristen Bell is seen at 'Jimmy Kimmel Live' on July 19, 2016 in Los Angeles, California. (Photo by RB/Bauer-Griffin/GC Images)
BEVERLY HILLS, CA - JULY 16: Actress Kristen Bell performs at 'United FORlando' presented by The Wallis and the Los Angeles LGBT Center at the Wallis Annenberg Center for the Performing Arts on July 16, 2016 in Beverly Hills, California. (Photo by Paul Archuleta/Getty Images)
THE GOOD PLACE -- 'What We Owe To Each Other' Episode 105 -- Pictured: Kristen Bell as Eleanor -- (Photo by: Justin Lubin/NBC/NBCU Photo Bank via Getty Images)
LAS VEGAS, NV - MAY 22: (L-R) Actresses Kristen Bell, Kathryn Hahn and Mila Kunis arrive at the 2016 Billboard Music Awards at T-Mobile Arena on May 22, 2016 in Las Vegas, Nevada. (Photo by Allen Berezovsky/Getty Images)
LAS VEGAS, NV - MAY 22: (L-R) Actresses Kathryn Hahn, Mila Kunis, and Kristen Bell attend the 2016 Billboard Music Awards at T-Mobile Arena on May 22, 2016 in Las Vegas, Nevada. (Photo by Todd Williamson/BBMA2016/Getty Images for dcp)
NEW YORK, NY - MAY 16: Actress Kristen Bell attends the NBCUniversal 2016 Upfront Presentation on May 16, 2016 in New York, New York. (Photo by Slaven Vlasic/Getty Images)
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