Beyoncé may have sent us into minor cardiac arrest with her show-stopping Grammys performance [1], but it was little miss Blue Ivy Carter who arguably had the best night on Sunday. In addition to hitting up the show dressed as a miniature version of late singer and fashion icon Prince [2], the big-sister-to-be appeared to have a blast cheering on her famous mom [3] with dad Jay Z and jumping into James Corden's star-studded Carpool Karaoke session [4]. Still, the best moments might have been the ones you didn't see on TV, like when she made a silly face at James in the audience or when she casually chatted it up with Rihanna, who also seemed to be having a good time [5]. It's safe to say Blue was definitely enjoying her night.