Nick Cannon-I dumped Kim Kardashian because:

This was my issue. We talked about this tape…And she told me there was no tape. 

'If she might have been honest with me I might have tried to hold her down and be like "That was before me" because she is a great girl.

'She’s actually one of the nicest people you’ll ever meet. But the fact that she lied and told me that there was no tape?'

And I still think she might have even had a part to play with [its release]"

By the way he dumped her on the Howard Stern show.