The former X Factor judge arrived at her party in a pair of leather shorts before slipping them off to reveal a black bikini with some serious neck bling for a day of celebration at the Ocean Beach Club on Sunday (14 July).
Tulisa has been on the Spanish party island for a week soaking up the sun with friends including Waterloo Road actress Chelsee Healey.
But although Tulisa's on her hols, she didn't forget to thank fans for their messages, writing on Instagram: "So much love from you guys on my birthday and I just want to say a massive thank you to all of you and give you all big kisses and hugs from me."
She also confirmed she'll be back on Twitter soon. Her last message on the social networking site was posted 31 May.
The day before, the 'Young' singer showed off her bikini body two swimsuits - a mint two-piece and a 50s-style two-piece - as she strolled along the beach in the sunshine, and it appears the celebrations started that night as Chelsee tweeted:" So we Going To Send Are T's birthday off with a Bang tonight!! Happppppy Buuuurrrrtday T T."
On 13 July, Tulisa's actual birthday, she wrote: "Happy birthday to my Girl @officialtulisa we Gon do it DifffffFferent! Myyyyyy babes xxxxxx."
As well as hitting Ocean Beach Ibiza, the group also partied at Eden in San Antonio, where Tulisa wore a cute white playsuit and black bowler hat.
Tulisa's Ibiza holiday album from the start:
Copyright: WENN Neil Warner