Friday, April 22, 2011 7:11am ET by  
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Justin Bieber's impromptu collaboration with Joel Madden

Canadian teen sensation Justin Bieber wowed fans in Malaysia last night when he brought out a very special guest to perform 'Don't Wanna Be In Love'. 

The 'Baby' hitmaker has earned himself a reputation of adding an element of surprise to his live shows, but went all out in Kuala Lumpur (April 21) when Good Charlotte's Joel Madden walked out on stage to join him. Before the gig, Madden tweeted to his 500k plus followers:

"About to check out the @justinbieber show in KL Malaysia. Hell yeah!! and he played me a new song and it's a hit!!"

The pair's impromptu collaboration caused both names to trend on social networking site Twitter and after the performance, Bieber wrote:

"the show must go on! Great show out in the Rain In Malaysia!! Crowd was incredible and it was HOT!!!!"

Watch the exciting duet here: