The N-Dubz singer and former X Factor judge, who labelled her house party Project X, invited close pals to her house on Saturday (31 August).
Tulisa's party was coincidentally on the same night that the highly-anticipated tenth series of The X Factor returned to our screens.
Tulisa, 25, who left the talent show last year to work on other projects, looked to be in good spirits as she posed for group photos.
Sharing plenty of photos and videos to Instagram, she declared: "Yesterday I hosted my very own project x...it went off."
Tulisa made the most of her day by hosting a barbecue before kicking off with the full-blown party. One video shows her friends jumping into the swimming pool, while another clip sees a group dancing along to loud music in the kitchen.
But Tulisa's night of partying may have left her embroiled in a new drama, after she shared with fans a photo of what some have claimed to show laughing gas cylinders on a table.
Tulisa reportedly posted the photo - which shows her sitting on the end of a couch with the nitrous oxide canisters and was published in today's The Sun - but quickly deleted and cropped out the table, before uploading it again. Although the substance is legal, the use of laughing gas has been criticised by anti-drug campaigners.
On a separate note, Tulisa is due to appear in court to answer bail in October, in relation to the accusation she introduced an undercover reporter to an alleged drug dealer.