Paris Hilton celebrated her 30th birthday in style this week with a fun fancy dress party in the excusive Hollywood Hills.

The heiress threw a themed pimps and showgirls bash, arriving on the arm of current boyfriend Cy Waits in showgirl fancy dress.

Some 300 friends and family attended and the police were present just to make sure nothing kicked off, although everything seemed to be very peaceful.

However, clearly not wanting just an ordinary fancy dress do, Paris also provided a petting zoo for her guests, complete with a lynx and a two-toed sloth.

Commenting recently on her milestone birthday, she said: "I'm freaking out! I can't believe I'm going to be 30! At least I still look like I'm 20."

Paris seems to be quite a big fan of dressing up - she recently wore a Marilyn Monroe costume to a publicity event for one of her fragrances.