Forget a scary monster or evil witch, this Halloween Dereck Whibley found inspiration from an unusual source - his ex-wife Avril Lavigne.

And his girlfriend Ari Cooper joined in the fun by taking the role of Avril's fiancé, Chad Kroeger. With Deryck's khohl-ringed eyes, blonde multi-hued hair and pout, and Ari's fake facial hair, the pair looked uncannily like the couple.

But one person not amused was Nickelback frontman Chad, who tweeted: 'Hey Deryck loved the costumes! We were going to dress up as you guys this year but all the parties had celebrity themes haha!'

Deryck, 32, was married to Avril between 2006 and 2009. He is the singer in rock band Sum 41, who were huge in 2002, but have had mixed fortunes of late.

Chad, 37, later sent another message to Deryck, confirming he was only joking, writing: 'You owe us a couples bowling grudge match see you when I get back from Russia!'

Although Deryck and Avril, 28, are divorced, they are still friends, and he worked on her 2011 album Goodbye Lullaby as co-producer and guitarist.

Avril is likely to have found Chad's response amusing as she recently admitted she fell for the rocker because of his sense of humour.

滬江娛樂(lè)快訊：

人氣搖滾小魔女艾薇兒的前夫德瑞克·韋伯利在上周末的萬(wàn)圣節(jié)Party上惡搞，與其現(xiàn)任女友阿麗·庫(kù)珀一起裝扮成艾薇兒和她的現(xiàn)任男友查德·克羅格。據(jù)此，看過(guò)照片后的查德·克羅格在Twitter上大方表示，他喜歡他們的裝扮。還說(shuō)，“我們也考慮要打扮成你們樂(lè)隊(duì)的模樣，但是很可惜今年我參加的每一個(gè)派對(duì)都有自己的主題。”對(duì)此，艾薇兒回應(yīng)道，她很喜歡查德的回答。

艾薇兒與前任男友，流行朋克樂(lè)隊(duì)SUM 41的成員德瑞克·韋伯利，于2006年在加州結(jié)婚，并在2009年正式分居。雖然離婚了，但兩人仍是朋友。艾薇兒的現(xiàn)任男友查得·克羅格是加拿大五分錢樂(lè)隊(duì)的主場(chǎng)，也是艾薇兒新專輯的制作人，兩人是在創(chuàng)作新專輯的過(guò)程中檫出了愛(ài)情的火花，在相處半年后修成正果，并在今年八月份訂婚。