Did he or didn't he? Kristen DeWitt, the ex-girlfriend of Nickelback star Chad Kroeger, is claiming he cheated on her with singer Avril Lavigne - as they split in May, but Chad and Avril reportedly started dating in February

 Did you know that Chad Kroeger was engaged right before he started hooking up with Avril Lavigne??  His ex Kristen Dewitt has been doing TV interviews and has been quoted saying. "Watch out Avril, he's a cheater!" 

 I guess she didn't even know that Chad and Avril were seeing each other until a friend told her they were tweeting back and forth. 

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