The singer and her date rapper Riff Raff were THE most buzzed-about couple on the red carpet, thanks to their throwback Britney Spears and Justin Timberlake denim ensembles. Oh, and she also won a VMA so that's always nice.
Surprisingly, though, neither of those two things were the highlight of Katy's night. While the pop star has probably met and mingled with any celebrity she's ever wanted to, she still gets starstruck sometimes, especially when Blue Ivy Carter is in the house.
During the show, Katy tweeted this...and we died right along with her:
Where was the audience cam during that moment? We want to get waved at by Blue Ivy, too!
Meanwhile, Kanye West is like 'Hey Blue: Imma let you wave and everything, but North West has the best wave of ALL time!'