Cheryl Cole celebrates her birthday with Will.i.am
And it seems Cheryl had one tequila shot too many, as she was left feeling rather confused the next day.
She joked on Twitter: ''Erm... few questions!! Who am I? Where am I?? Why am I?? What am I? @NicolaRoberts @KimberleyJWalsh (sic).''
Cheryl's friends surprised her by wearing masks with her face on and she was also given a giant birthday cookie.
But now Cheryl is ready to catch up on her beauty sleep - and we don't blame her!
She Tweeted yesterday: ''#DearVegas you win !! I officially bow down .. It wasn't a knock out i just took a graceful seat ! I came I saw YOU conquered #isaluteyou..
''#Vegas #3daysnosleeps #1body2minds #gohardorgohome #wheresmybed.''