Chris Brown continues his 24th birthday celebration at 1 OAK Nightclub in Las Vegas still without Rihanna

Chris Brown celebrated his 24^th birthday for a second night and he did not seem to be missing Rihanna.

Chris Brown continued his birthday bender on Saturday night at 1 OAK Nightclub in Las Vegas, where he wound up shirtless, smoking cigarettes and drinking the night away.

He brought an entourage of friends to the club where they took over the DJ booth and made the place their own until 5 a.m.

Chris Brown started the night off dressed in a rather civilized all-black hooded ensemble.

He posed outside of the 1 OAK Nightclub, sunglasses on and ready to party.

Chris Brown is said to have signed a lucrative deal with the club, which may be what brought him to the venue for the second round of his birthday celebrations.

Later in the night, the raging began when Chris Brown rid himself of the hooded sweater revealing a black singlet.

He popped a cigarette in his mouth and seemingly took control of the DJ booth whilst his friends partied it up at a VIP table.

It was not long before even the singlet became too much, so Chris Brown tore it off and danced raucously above the crowd with a group of friends, including a horde of excited women.

There was almost always a cigarette and drink in hand as singer partied for hours.

Chris Brown, who seems to have regained control of his Twitter account after having it suspended, gave all the gory details of what seems to have been a rather intense night of partying.

“Do too wasted at the party. Threw up crazy!! Lol!” he tweeted, giving away a little too much information.

Meanwhile, Chris Brown’s on-again-off-again girlfriend Rihanna enjoyed her own celebration – at a basketball game.

Rihanna looked glamorous in a slinky black outfit and sexy black lace-up heels as she sat courtside to watch the Chicago Bulls play against the Brooklyn Nets on Saturday night.

She is currently in New York on her Diamonds World Tour… hence her inability to attend round one and two of Chris Brown’ s celebrations.

But if what the singer tweeted last week is anything to go by, a party with Rihanna may be next on his list.

“LA, VEGAS, NEW YORK! Celebrating this WEEK on to the next week! #birthdayturnup,” Chris Brown tweeted last Thursday.