Wiz Khalifa, American actress Camila Banus, 90210 star Lori Laughlin and her daughter Olivia Jade Giannulli, rapper Chanel West and Kelli Berglund were also present.
Adrienne Bailon also made an appearance at the party, supporting the older sister of her ex-boyfriend Rob Kardashian.
She was seen cosying up to Australian model Shanina Shaik on her arrival, with the fashion star stunning in an Oriental-inspired silk two-piece.
Other guests included Instagram star Chantel Jeffries who teased a look at her lacy lingerie underneath her black two-piece, as well as glamour model Abigail Ratchford who put on a titillating display in a revealing sequinned bikini top and semi-sheer leggings.
Beauty: The mother-of-three, who is often seen working up a sweat in order to maintain her gym-honed physique, teased a look at her bust in the low-cut frock, that came complete with dainty spaghetti straps at either shoulder She finished off her eye-popping look with a slick of coral nude lipstick across her lips and proved why she has been snapped up by the fashion brand, as she modelled her fun-loving dress for waiting photographers on her arrival.
Her collaboration with Pretty Little Thing has been described as 'high voltage', with the TV personality's luxurious collection is said to 'capture Kourtney' and include several party pieces.
She had previously hit out at the Kardashian name for damaging her career, following her split with Rob, but proving there is now no bad blood between herself and her former beau's family, she appeared in great spirits as she checked out Kourtney's bash.
The former Disney starlet looked gorgeous in a navy pinafore dress she paired with a plain white tee underneath and complementing court heels.
We love a celebrity collaboration, but when a Kardashian is involved, you know it's going to be good!The Dip It Low hit-maker covered up in a black cold-shoulder denim jacket, that came complete with pearl detailing, and she added height to her ensemble with a stylish pair of sock boots.Christina swept her dark tresses up into a high topknot and accessorised her outfit with layered silver pendants around her neck.She had teased at the prospect during an interview with Grazia magazine, but has since assured fans she was joking and had comment had been taken out of context.Kourtney seemingly left a reporter baffled by insisting she was set to become the fourth sister in the Kardashian-Jenner family expecting a child, by exclaiming in the interview: 'I'm pregnant!