Kim Kardashian is reportedly undergoing specialist cellulite removal treatment.

The socialite - who was recently criticized by former friend Paris Hilton for having "cottage cheese butt" - has the treatment along with sister Khloe and Kourtney in an upcoming episode of their reality TV show, 'Keeping Up with the Kardashians'.

A source said: "In the episode, which will air in the US on May 11, Kim, Khloe and Kourtney talk about their body-image issues and have this specialist treatment.

"However, Kim was so impressed with the treatment that she has continued to have regular sessions since they filmed the episode."