Only spoilt heiresses can invent the concept of and throw pre-birthday parties! This warm-up party at Los Angeles Nightclub was a star-studded affair, with Alli Sims, Christine Lakin and Daniel DeCriscio, among others, present. The pink-haired, tiara-clad Paris Hilton then proceeded to Villa lounge in West Hollywood.

The actual birthday bash was a huge event. The socialite celebrated her 27th year by reveling in a sexy song-dance show with the Pussycat Dolls at Pure Nightclub, located inside of Caesars Palace in Las Vegas. Paris floated in a larger-than-life champagne glass, posed for photographs and wowed the crowd, including her sister Nicky, Stephanie March, Robin Antin and Bobby Flay, with her sensuous moves. Paris was attired in a skimpy white dress designed by herself, which revealed more than it concealed.

The Birthday cake looks yummy! And HUGE too!