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Justin Bieber was forced to pull out of his only Australian gig amid fears for his safety.

The 'Baby' singer was due to perform at Sydney Harbour, but police cancelled the event after more than 100 teenagers became "distressed", according to officials.

Bieber took to his Twitter page to speak of his disappointment about the cancellation and apologised to fans who had camped overnight to see him.

He said: "I love my fans and I am just as disappointed as everyone else with the news from this morning. I want to sing for my fans. I want to make this clear... I don't cancel... I woke up this morning to the police canceling the show for safety reasons (sic).

Florence & The Machine, Rihanna, Alicia Keys, Dizzee Rascal, Pendulum and Cheryl Cole will all perform at BBC Radio 1's Big Weekend in Bangor, on 22 and 23 May.

Chris Moyles unveiled the line-up of over 30 UK and international artists who will be playing on the two main stages during his show, with a bit of help from fellow Radio 1 DJ Zane Lowe.

Other artists include Scouting for Girls, Biffy Clyro, JLS, the Lostprophets, Kids in Glass Houses and Marina & The Diamonds.

BBC Radio 1's Big Weekend is the station's flagship event and the UK's biggest free ticketed festival. Around 40,000 fans can enjoy performances from four stages in Vaynol Estate - the Main Stage; the In New Music We Trust Stage; the Outdoor Stage and the BBC Introducing Stage.

For listeners tuning in there will also be exclusive Live Lounge sessions broadcast from backstage.