Avril Lavigne’s ex, Sum41’s Deryck Whibley, and his girlfriend went to a costume party as the pop punk princess and her current fiancĂ©e, Nickelback’s Chad Kroeger. What Whibley didn’t know was you don’t mess with Mr. Nickelback! Kroeger took to twitter and took a jab at Whibley. Via Twitter:

Hey Deryck loved the costumes! we were going to dress up as you guys this year but all the parties had celebrity themes haha! -CK

Ooooh, someone got dissed. Check out this old interview of the Kroeg-meister. What a cool, humble, fun-loving guy!

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