Thanks to the wonderful Perez Hilton (who was so lucky he was actually invited to the bash) we get to see some exclusive pictures from inside the birthday party, held at Paris’ mansion.



Perez writes: Miss Paris Hilton threw a surprise birthday party for her boyfriend, Stavros Niarchos, Monday night at her Hollywood Hills mansion.
The birthday boy celebrated a milestone, his 21st, and was surrounded by his friends, lots of really hot, tall, skinny, accented foreigners.
Paris recently renovated her home, which she jokingly dubbed Club Paris, and many of her friends saw the finished product for the first time Monday.
Revelers included: Nicky Hilton, Kevin Connolly, Brett Ratner, Milla Jovovich, Vincent Gallo, Elisha Cuthbert, Kimberly Stewart, Jon Alagem, David Katzenberg, Brody Jenner, Andy Milonakis, Casey Johnson and Lucas Haas.
Around midnight, Courtney Love made a surprise appearance, accompanied by Billy Corgan and her drummer/friend Lisa.
Miss Love looked gorgeous, dressed in all black, wearing strappy, diamond-covered heels, and her hair adorned with decorative fabric.
At 1:30 A.M., some boys and girls jumped in the pool, including Stavros – clad in his boxers – and Paris (who went swimming in her dress). Quite a fun way to cap the evening!
Credit: Perez Hilton and Jay! =)