Paris Hilton's ex-BF Doug Reinhardt recently celebrated his 26th birthday -- and one of the party guests was Jasmine Waltz, the girl who's been linked to David Arquette since his split from Courteney Cox.

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Other celeb guests at the bash included "The Hills" co-star Brody Jenner, Stacy Keibler, and Milwaukee Brewers Ryan Braun and Randy Wolf.

Sources tell TooFab the party was wild -- with a 10ft ice luge, photo booth, psychic, palm reader and a Yogen Fruz smoothie bar.

Though Jasmine and Doug used to date, he was spotted getting cozy with "Make It or Break It" actress Cassie Scerbo.

Check out more party pics!