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She may be turning 33, but Paris Hilton will always be a Barbie Girl.

The heiress-turned-DJ celebrated her birthday a couple days early on Saturday night, throwing a giant party at Greystone Manor in Los Angeles.

And look at that outfit!

Hilton made sure you couldn't miss her in a crowd, showing up in a hot pink dress with slits up both sides. She finished her look with sparkly heels, some killer makeup and a tiara, of course.

Paris made sure to credit the dress' designer, Alon Livne, on Instagram, giving him props for her runway-ready look.

"My dress has a very high cut slit! And that's because it's a dress straight off the runway," she wrote. "I saw it in my friend @AlonLivne's #NYFW fashion show & I just knew it would be the perfect #Birthday dress! Loves it! #CoutureRunwayBarbie"

You have to admit, it's pretty perfect for the Beverly Hills princess!

Hilton actually celebrates her birthday tomorrow. 

Check out more pics from inside the party in the gallery above!