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Justin Bieber, Katy Perry team up for Japan charity song

Justin Bieber
Image: Getty
Music guru Simon Cowell has enlisted the help of Justin Bieber, Britney Spears and Katy Perry for a special charity song for Japan.

Cowell tweeted: "Ok, For What Has Happened In #Japan I Will Be Getting Loads Of Singers To Do A Song For It, @justinbieber @britneyspears @katyperry And More".

Since then, the former American Idol judge has recruited Jessie J and Cher Lloyd — but he still wants more!

Both Justin Bieber and Katy Perry are coming to Australia for concert tours in April. Click here for Justin Bieber tickets and here for Katy Perry tickets.

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