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14 March 2012, 11:14 | Updated: 14 March 2012, 11:55
The 'Who You Are' singer says she got her touring partner "good" after appearing during his set.
Jessie J pranked Professor Green by walking out during his set dressed as a tiger on her Australian tour in Adelaide today (14th March).
The 'Never Be A Right Time' star, who has been supporting the 'Price Tag' singer on the jaunt, got a surprise while he was performing live on the last gig of the outing.
Jessie took to Twitter to reveal details of her prank earlier today.
She tweeted: "Just pranked @professorgreen GOOD!!!! Hahahaha "Out here in this JUNGLE" #lastnightspranks (I'm the tiger)."
The singer then also retweeted a fans' post which read: "haha @jessiejofficial just came out during professor green's set, in a tiger mascot HAHA! last show of the tour pranks! :-) lucky RADELAIDE!"
You can view a picture of Jessie dressed up as a tiger below: (Picture: Twitter)
Earlier in the week, Jessie posted a picture of the pair hanging out backstage and Pro Green took to his own social network account to give his thanks to the female star.
He tweeted: "It's been a pleasure, an absolute bloody pleasure; you're a darlin' @jessiejofficial xxx"
The star had been suffering from vocal exhaustion on the jaunt and will return to the UK for the start of The Voice UK where she appears on the judging panel alongside Will.i.am, Danny O'Donoghue and Sir Tom Jones.