Kimberly Stewart celebrating her sister's birthday with friends at Boogaloo before heading to Kabaret. London, England - 18.06.07

Socialite Kimberly was photographed leaving a Los Angeles nightclub this week (ends29Jun07) with Pamela Anderson's ex, 44-year old Lee, who is famed for substance abuse and shooting a homemade sex film with his ex-wife.

Lee - who was also once married to blonde Heather Locklear, went to jail in 1998 for physically abusing Anderson.

A friend of Stewart says, "Tommy Lee makes Calum Best look like a saint. It won't be long before Rod's on the phone."

Source: WENN