Kardashian 'upset by nude photo release'

Kim Kardashian has reportedly become upset by the release of several nude photos.

The 29-year-old posed for Playboy in 2007 but was angry about the recent release of 25 previously unseen photos from the shoot, reports Radar Online.

"Kim was really upset that the new photos were released," a source said.

"She freaked out that they were out there, she didn't think that they were going to be seen again."

Kardashian previously admitted that she regrets posing for the magazine.