Rihanna Celebrates Belated 21st Birthday at Hollywood Club

Rihanna celebrated her belated 21st birthday Tuesday with pals - but not with on-again beau, Chris Brown.

Wearing sunglasses, the singer �" who turned 21 on Feb. 20 �" hit West Hollywood hot spot Coco de Ville. On a private patio with pals, Rihanna was sent a bottle of Armand de Brignac champagne, which she toasted using the club's signature tulip flutes.

She also enjoyed a pink cupcake tower that featured a flower that lit up like a sparkler.

The singer (who wore sunglasses) "looked good," says a club-goer "She was smiling and laughing." - It's so evident that we're more concerned about Rihanna's well being than she is! I wonder what would happen if she kept her hands off of Chris instead of allegedly beating him first time and time again?! Makes you go 'hmmm....,' doesn't it?