Britney's singing a capella y'all. During the auditions for The X Factor USA, L.A. Reid turned 56 (remind us to look up his skincare regime cos he is looking well for 56), and Brit surprised him with cake and a private song. Yes it's a little shakey, but she's had a hard time. And she's balancing a cake and walking. Cut her some slack.

Also GO HOME Louis. You don't even go here!