06/29/2010 05:12 am ET Updated May 25, 2011

Naomi Campbell Signs 'No Phone Throwing' Pledge For Oprah Winfrey

Naomi Campbell opened up to Oprah Winfrey on Wednesday, with the supermodel signing a "No Phone Zone" ledge and a "No Phone Throwing Zone" pledge, WWD reports. Campbell talked about recently punching an ABC News camera when asked about the blood diamond saga and being accused of assaulting a driver in early March.

Her mother Valerie and boyfriend Vladimir Doronin were in the audience. The episode will air on Monday.