When Caitlin, a huge Fifth Harmony fan, was invited by Shazam Top 20 to their studio she had no idea that she was about to get the biggest surprise of her life. The video starts off with Caitlin, in front of a microphone, singing along to the Fifth Harmony single "Sledgehammer." But then as soon as Caitlin gets to the first chorus, a black curtain from the next room rises and the girls from Fifth Harmony are unveiled, and they start singing along with Caitlin.

Caitlin is obviously and visibly completely overwhelmed, just as we'd expect her to be. But she continues singing the rest of the song, all the while being cheered on by the girls who are super supportive the entire time. They say things like, "Yes Caitlin, you are slaying my life right now" and "Go Caitlin! Go Caitlin! Go Caitlin!" We really have to hand it to Caitlin for hanging in there and nearly finishing the song, because if we were faced with the prospect of singing along to one of our favorite artists' hit songs while said artists stand in an adjacent room watching and listening in, we would be so mortified we would probably drop dead on the spot just to avoid having to exist in a world where that was immortalized on tape.

But the cool thing about Fifth Harmony is how sweet they are to Caitlin. Once she's done singing, she's taken into the room where the girls are and they all crowd around her to smother her in affection. It's pretty great. Check out the video above to see for yourself!

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