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"Deryck Whibley looked barely recognisable as he arrived at a concert with model girlfriend Ari Cooper in Los Angeles over the weekend (June 8).  The 33-year-old Sum 41 singer wore his bleached and flame-tipped hair up in messy spikes and sported a slightly rounder face as he attended a Tom Petty gig at the Fonda Theater with Cooper.    Whibley, who divorced popstar Avril Lavigne back in 2010, cancelled dates of the band&amp;#039;s &amp;#039;Warped&amp;#039; tour in 2011 and their British tour in early 2012 due to a back re-injury.  Last year, he and his 6ft-tall girlfriend Cooper mocked Lavigne and fianc\u00C3\u00A9 Nickleback frontman Chad Kroeger by dressing up as the couple for a Halloween bash.  Kroeger responded on Twitter and wrote: &amp;quot;We were going to dress up as you guys this year but all the parties had celebrity themes haha! -CK.&amp;quot; Take a look at the best celebrity pictures of the day below.  "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/showbiz/news/a488620/sum-41-singer-deryck-whibley-barely-recognisable-pictures/>