PrettyLittleThing owner Umar Kamani poses at his 33rd birthday party with Snoop Dogg

Umar Kamani appeared to be in excellent spirits as he was joined by his celebrity friends to celebrate his 33rd birthday in LA on Monday night. Celebrations: Umar Kamani appeared to be in excellent spirits as he was joined by his friends to celebrate his 33rd birthday in LA on Monday night Music: Snoop Dogg, Christina Milian and Chris Brown took to the stage to perform at the fun-filled birthday bash Umar looked effortlessly stylish in black jeans and a black T-shirt, which he wore underneath a sweeping dark wool jacket. Friends: The PrettyLittleThing owner cut a smart figure as he posed with his model fiancée Nada Adelle and pals including Karrueche Tran and J.Ryan La Cour Entertaining: Chris sported a head of unmissable clipped blonde locks while putting on an intimate performance for entertained guests alongside singer Tank and Avery Wilson Stylish: Umar looked effortlessly stylish in black jeans and a black T-shirt, which he wore underneath a sweeping dark wool jacket as he posed with rapper Snoop Fun: Umar's girlfriend Nada flaunted her sensational physique in a clinging black dress with a daring side split as she posed with pals including Will.i.am and Chris Brown Group shot: Fashion retailer Umar sported his signature shades while he wore his dark tresses in a shaved style and flashed a huge grin as he posed with his celebrity pals The smitten couple were seen striking playful poses with rapper Snoop, 50, who donned a black varsity jacket with grey sleeves and looked ever-cool in a pair of white-rimmed sunglasses. Exes: Chris Brown risked an awkward run-in with his ex girlfriend Karrueche Tran, who he dated on and off between 2011 and 2014 Stunning: Karrueche appeared to be in excellent spirits as she flashed a huge grin while posing for snaps with the birthday boy and her pal Christina Playful poses: Umar gave the peace sign and flashed a grin as he posed alongside a group of friends, including Avery Wilson, Mario, Tank Chris Brown and singer Stevie Mackey Good times: Umar stopped to pose with Russell Peters as he sported his signature shades at the birthday bash Performance: Chris and singer Tank appeared to be keeping the crowds entertained with their show at the birthday bash Good night: Streamers were seen across the floor as the night got underway, with Umar seeming to have an incredible time Karrueche appeared to be in excellent spirits as she flashed a huge grin while posing for snaps with the birthday boy and her pal Christina. In their element: The rapper, 50, was joined by the actress, 40, and singer, 32, as they belted out their greatest hits at the bash celebrating the billionaire's 33rd year Trendy: Donning a black varsity jacket with grey sleeves, the Drop It Like It's Hot songster looked ever-cool in a pair of white-rimmed sunglasses Spectacular: Snoop certainly didn't disappoint with his sensational gig Hot stuff: Christina flaunted her enviable figure in a tight black-and-white maxi dress, while elevating her height with a pair of black heels Woah!