Karruche Tran and Chris Brown

Chris Brown and Rihanna relationship is clearly on the rocks and it was more evident than ever last night.

Chris Brown, who turns 24 years old tomorrow (May 5), kicked off his birthday celebration last night and his ex-girlfriend Karrueche Tran was right by his side and Rihanna was no where to be found.

See also: Chris Brown Unfollow Rihanna On Twitter, We Smell Trouble In Paradise

The “Turn Up The Music” singer rolled up at Emerson nightclub in Los Angeles last night with his boys and Karrueche Tran rolled up shortly afterwards.

Chris Brown birthday party 2

Rihanna was in Canada this week for her Diamonds World Tour. Perhaps Breezy is trying to get his mind off her.

Karrueche Tran and Chris Brown birthday party

Christina Milian, Chloe Green, and David Hasslehoff also joined Chris Brown and Tran for the party.

Chloe Green at Chris Brown Party

Chris Brown birthday party 1