Kelly Osbourne Pictures: Keeping Up with the Kardashians Season 5 Premiere Party Photos and Pics

Kelly Osbourne Pictures: Kelly Osbourne attends the "Keeping Up with the Kardashians" season 5 premiere party at Trousdale on August 19, 2010 in West Hollywood, California.

Last night's premiere party was missing one member of the Kardashian clan.

"So sad that I'm missing the Keeping Up viewing party tonight at Trousdale!!!! My whole family is going to be there :( " wrote Khloe Kardashian, who is currently away in Madrid, Spain, on Twitter.

The fifth season of "Keeping Up with the Kardashians" premieres Sunday night on E! at 10 p.m.

Photo credit: Tommaso Boddi / PR Photos