The 'Spring Breakers' actress spared no expense on her younger sibling Stellar for her big day and treated her to a wild bash at Beacher's Madhouse nightclub at the Hollywood Roosevelt Hotel in celebration of her landmark birthday on Saturday night (16.11.13).
The party was reportedly alcohol-free as many of the guests were under the US legal drinking age of 21.
Amongst the party goers was Will Smith's daughter Willow, 13, who was overheard asking the DJ to play Kanye West and watched a "Mini-Kanye" perform for guests.
Vanessa, 24, was spotted getting belly-dancing lessons from burlesque star Amazon Ashley - who famously taught Miley Cyrus how to twerk.
Vanessa - who is dating Austin Butler - was seemingly enjoying herself, despite her admission last month that's she doesn't enjoy partying and "loathes" nightclubs.
Speaking to Cosmo On Campus magazine, she said: "I have never liked partying; I love dancing, but that's as far as it goes. It's tough because a lot of clubs are everything I loathe, especially in LA. They're always very ego-filled and people get up to mischief. It's just not a pure environment. I stay away from [drugs] because I know it's smart to steer clear."