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Avril Lavigne’s ex-husband dresses up as her for Halloween

Avril Lavigne and her ex-husband Deryck Whibley, the Sum 41 rocker she was married to for three years, have been on pretty friendly terms since their 2009 split. Whibley even produced many of the songs on Lavigne's latest album, last year's Goodbye Lullaby. "We're not doing each other but yes, we're friends," Lavigne, 28, revealed to Chelsea Handler on "Chelsea Lately" in May 2011. "I really respect him as a person and as an artist, so it's all good." But Lavigne, or at least the current rocker guy in her life, Nickelback's Chad Kroeger, probably aren't raving about Whibley today.

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Deryck Whibley and Ari Cooper (Twitter)

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Lavigne and Kroeger (Marc Piasecki/FilmMagic)

Over the weekend, Whibley, 32, and his girlfriend Ari Cooper spoofed Lavigne and her fiancé by dressing up as them for Halloween! The worst part is that Whibley went as his ex-wife, donning a white hoodie and a blond wig with — of course — hot pink and neon green streaks. Meanwhile, Whibley's new lady love sported a wavy shoulder-length wig, a stache and beard, and a Jack Daniels T-shirt to play the part of Kroeger. When a pic of the pair somehow ended up on Twitter, let's just say it didn't go over so well with Kroeger, 37, who responded via Nickelback's official Twitter account.

"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" Ouch. Kroeger then attempted to soften his harsh words with a somewhat friendlier message that referenced his current world tour with Nickelback. "You owe us a couples bowling grudge match see you when I get back from Russia! -CK." For now, Lavigne, who's Canadian just like Whibley and Kroeger, is staying out of it and hasn't tweeted a response or released a statement regarding her ex's Halloween getup.

Do you think the Lavigne and Kroeger costumes were a good idea?

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