It might be the most annoying song ever written, but Pinkfong's "Baby Shark" can now be credited with saving a young life - thanks to a quick-thinking Florida mum.
Stephanie Uecker was at a local pool with her friend Dilek Moon when she noticed a "little dark shadow" in the water.
It was Moon's four-year-old son, Fletcher.
"I just dove and picked him up with my right arm, and swam as fast as I could," Ms Uecker said.
But her CPR lessons weren't the only thing to pop into her mind - "Baby Shark" did too.
"I hate that song. Ms Uecker told WESH News. "My kids play it all the time."
Somehow, the mum recalled hearing that "Baby Shark" was the perfect rhythm for CPR. And her instincts kicked right in.
"I just remembered, 'sing Baby Shark,' and I remember singing it out loud, thinking she's going to think I'm nuts,'" Ms Uecker said of her friend.
But that couldn't be further from the truth.
"I don't know how to thank someone adequately who gives you your child back," Ms Moon said.
Earlier this year, Pinkfong released a YouTube video to help kids learn CPR. "The first verse of "Baby Shark" song is 110 beats per minute, which is an ideal rate for CPR! 100 to 120 chest compressions per 60 seconds," the description reads.
(Other songs include "Stayin' Alive" by the Bee Gees at103 BPM and ABBA's "Dancing Queen" ABBA at100 BPM).
The viral hit is now the seventh most viewed clip on YouTube, just behind Justin Bieber's "Sorry", a fact Pinkfong had a little too much fun with ...
As of 21 August it's sitting at a cool 3,270,679,706 views - and counting.
But while the above might have you groaning into your shark-branded cornflakes, or hurling your shark soap out the window, next time your kids are playing the song on loop just remember those doo doo doo doo doo doos saved a life.
And you never know when you might just need them yourself.