Poor Paris Hilton. While she was out party hopping last night, someone broke into her brand-new house (located in the Valley, of all places?!) and stole $2 million worth of jewelry.

Luckily, when the burglars broke in at 5 a.m., Paris wasn't home. No word on her whereabouts in the wee hours, but we do know she took her new BFF Brittany Flickinger to dinner at Electric Karma and hit up Christina Aguilera's A Clockwork Orange-themed birthday party at Mozza before heading to Bar Delux.

Also at the hot spot was Avril Lavigne, without hubby Deryck Whibley yet again. Her party pal as of late, Brandon Davis, was also spotted at the club. Coincidence? We think not.