While Rihanna is away on her Diamonds World Tour, Chris Brown kicked off his birthday festivities Friday. He celebrated his birthday at Emerson nightclub in Hollywood, attended by his ex-girlfriend Karrueche Tran, Christina Millian and some other friends.

According to TMZ, Karrueche was invited by Chris himself to the party to celebrate Chris turning 24. TMZ sources say the two still talk often and hang out, and that she still cares about Chris very much.

Meanwhile, Rihanna is currently in Brooklyn fetting ready for her Barclays Center tour stop which has been postponed until Tuesday.

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