Watch Carrie Underwood serenade son with helium voice for his birthday

Birthday boy! Carrie Underwoodserenaded her 4-year-old son, Isaiah, on his big day, but she sang the classic “Happy Birthday” song with a twist.

The country singer, 35, sucked from a yellow balloon before giving her son a dramatic rendition of the song in a video her husband, Mike Fisher, posted on Instagram on Wednesday, February 27. Underwood added extra syllables to Isaiah’s name, and as soon as she finished, the little one reached out for the balloon to try for himself.

The American Idol alum held her newborn baby boy in her arms while she performed. Jacob was born on January 21.

The “Cry Pretty” singer announced his birth on Instagram two days after he arrived, writing, “Jacob Bryan Fisher entered the world in the wee hours of the morning on Monday. His mom, dad and big brother couldn’t be happier for God to trust them with taking care of this little miracle! Our hearts are full, our eyes are tired and our lives are forever changed. Life is good.”

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Happy birthday Isaiah😂!!

A post shared by Mike Fisher (@mfisher1212) on

The former NHL player, 38, posted a close-up pic of their second son that same day. “Jacob Bryan Fisher! You are a gift from our Lord!” he wrote. “The last few years has has had its challenges and it makes this moment even more sweet!”

Fisher added: “We didn’t know if Izzy would ever have another sibling but we learned through it all that God is in control and his timing is perfect! He is good all the time even in the difficult times that are hard to understand. #grateful #miracle baby.”

The couple, who tied the knot in 2010, welcomed Isaiah in 2015. Underwood and Fisher’s eldest didn’t just celebrate his birthday with a high-pitched song this year, but went to a Nashville Predators hockey game on Tuesday, February 26, and stood on the ice with his dad.

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Carrie Underwood and Mike Fisher together
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Carrie Underwood and Mike Fisher together
NASHVILLE, TN - JUNE 06: Mike Fisher (L) and Carrie Underwood attend the 2018 CMT Music Awards at Bridgestone Arena on June 6, 2018 in Nashville, Tennessee. (Photo by Jeff Kravitz/FilmMagic)
NASHVILLE, TN - JUNE 06: Mike Fisher (L) and Carrie Underwood attend the 2018 CMT Music Awards at Bridgestone Arena on June 6, 2018 in Nashville, Tennessee. (Photo by Jeff Kravitz/FilmMagic)
NASHVILLE, TN - NOVEMBER 08: NHL player Mike Fisher and singer-songwriter Carrie Underwood attend the 51st annual CMA Awards at the Bridgestone Arena on November 8, 2017 in Nashville, Tennessee. (Photo by Jason Davis/FilmMagic)
BRENTWOOD, TN - OCTOBER 24: Singer-songwriter Carrie Underwood (L) and NHL Player Mike Fisher (R) attend Nashville Shines for Haiti benefiting Sean Penn's J/P Haitian relief organization featuring Tim McGraw hosted and underwritten by Johnathon Arndt and Newman Arndt at the Arndt Estate on October 24, 2017 in Brentwood, Tennessee. (Photo by Rick Diamond/Getty Images for J/P Haitian Relief Organization)
NASHVILLE, TN - JUNE 08: Nashville Predators forward Mike Fisher and Carrie Underwood attend the 2016 CMT Music awards at the Bridgestone Arena on June 8, 2016 in Nashville, Tennessee. (Photo by Taylor Hill/FilmMagic)
NASHVILLE, TN - JUNE 10: Singer Carrie Underwood and NHL player Mike Fisher attends the 2015 CMT Music awards at the Bridgestone Arena on June 10, 2015 in Nashville, Tennessee. (Photo by Jeff Kravitz/FilmMagic)
NASHVILLE, TN - JUNE 10: Singer Carrie Underwood (L) and NHL player Mike Fisher attend the 2015 CMT Music awards at the Bridgestone Arena on June 10, 2015 in Nashville, Tennessee. (Photo by Kevin Mazur/WireImage)
NASHVILLE, TN - SEPTEMBER 09: Mike Fisher and Carrie Underwood attend the 8th Annual ACM Honors at Ryman Auditorium on September 9, 2014 in Nashville, Tennessee. (Photo by Rick Diamond/Getty Images for ACM)
LAS VEGAS, NV - MAY 18: (EXCLUSIVE COVERAGE) Singer Carrie Underwood (R) and hockey player Mike Fisher attend the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Kevin Mazur/Billboard Awards 2014/WireImage)
NASHVILLE, TN - JUNE 04: Mike Fisher and Carrie Underwood attend the 2014 CMT Music awards at the Bridgestone Arena on June 4, 2014 in Nashville, Tennessee. (Photo by Larry Busacca/WireImage)
Carrie Underwood and Mike Fisher attend the 'TIME 100 Gala, TIME's 100 Most Influential People In The World' at the Frederick P Rose Hall at Lincoln Center in New York City. � LAN (Photo by Lars Niki/Corbis via Getty Images)
NASHVILLE, TN - JUNE 05: NHL player Mike Fisher (L) and singer Carrie Underwood attend the 2013 CMT Music awards at the Bridgestone Arena on June 5, 2013 in Nashville, Tennessee. (Photo by Kevin Mazur/WireImage)
FRANKLIN, TN - DECEMBER 03: Carrie Underwood and Mike Fisher attend the CMT Artist of the Year Awards at The Factory At Franklin on December 3, 2012 in Franklin, Tennessee. (Photo by Ed Rode/FilmMagic)
LOS ANGELES, CA - NOVEMBER 18: Singer Carrie Underwood (R) and husband Mike Fisher arrive at the 40th Anniversary American Music Awards at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Gregg DeGuire/WireImage)
LOS ANGELES, CA - NOVEMBER 18: Singer Carrie Underwood (R) and NHL player Mike Fisher at the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Mazur/AMA2012/WireImage)
NASHVILLE, TN - NOVEMBER 01: Recording artist Carrie Underwood and husband Mike Fisher attend the 46th annual CMA Awards at the Bridgestone Arena on November 1, 2012 in Nashville, Tennessee. (Photo by Jon Kopaloff/FilmMagic)
NASHVILLE, TN - JUNE 06: Mike Fisher and Carrie Underwood attend the 2012 CMT Music awards at the Bridgestone Arena on June 6, 2012 in Nashville, Tennessee. (Photo by Taylor Hill/FilmMagic)
NASHVILLE, TN - JUNE 06: Mike Fisher and Carrie Underwood attend the 2012 CMT Music awards at the Bridgestone Arena on June 6, 2012 in Nashville, Tennessee. (Photo by Michael Loccisano/WireImage)
LOS ANGELES, CA - MAY 23: Mike Fisher and singer Carrie Underwood arrive at Fox's 'American Idol 2012' Finale Results Show at Nokia Theatre L.A. Live on May 23, 2012 in Los Angeles, California. (Photo by Alberto E. Rodriguez/Getty Images)
LOS ANGELES, CA - MAY 23: Singer Carrie Underwood and professional ice hockey player Mike Fisher arrive at 'American Idol' Season 11 Grand Finale Show at Nokia Theatre L.A. Live on May 23, 2012 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
LAS VEGAS, NV - MAY 20: NHL Player Mike Fisher and Singer Carrie Underwood arrive at the 2012 Billboard Music Awards held at the MGM Grand Garden Arena on May 20, 2012 in Las Vegas, Nevada. (Photo by Jon Kopaloff/FilmMagic)
NASHVILLE, TN - JUNE 09: Mike Fisher and Carrie Underwood attend the 2010 CMT Music Awards at the Bridgestone Arena on June 9, 2010 in Nashville, Tennessee. (Photo by Jeff Kravitz/FilmMagic)
NASHVILLE, TN - JUNE 09: Mike Fisher and Carrie Underwood attends the 2010 CMT Music Awards at the Bridgestone Arena on June 9, 2010 in Nashville, Tennessee. (Photo by Kevin Mazur/WireImage)
LOS ANGELES, CA - JANUARY 31: NHL player Mike Fisher and singer Carrie Underwood arrive at the 52nd Annual GRAMMY Awards held at Staples Center on January 31, 2010 in Los Angeles, California. (Photo by Jeff Vespa/WireImage)
Singer Carrie Underwood and hockey Player Mike Fisher onstage during the 52nd Annual GRAMMY Awards - Salute To Icons Honoring Doug Morris held at The Beverly Hilton Hotel on January 30, 2010 in Beverly Hills, California. (Photo by Lester Cohen/WireImage)
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