Justin Bieber is determined not to disappoint his fans in Australia as he insisted to go on stage despite back pains that have been killing him since he touched down in Brisbane.

The 17-year old teen sensation has a show in Sydney Wednesday evening for his sold-out concert Thursday evening at Acer Arena.

The teen singer had reportedly sought for medical treatment as soon as he got off the plane Wednesday afternoon for his sore back in preparations for Thursday show.

"He's all about his fans and was saying he didn't care what anyone was telling him to do," a source was quoted as saying by The Daily Telegraph.

A spokeswoman for Frontier Touring according to The Daily Telegraph, said that are waiting for Bieber’s management team to give them the word if the teen sensation will show up in his Sydney concert for two consecutive days.

But chances are Bieber would again defy his doctor’s advice.

He was first told not to go on stage for his Brisbane show but went to perform for his fans anyway.The singer even received rave reviews both from 12,000 fans and his critics.

Justin touched down 90 minutes before the Brisbane show Tuesday night after some plane trouble during his trip from Indonesia before heading to Australia.

"Crazy 24 hours of travel ... back is messed up ... but we are smiling. We finally made it. AUSTRALIA we are here," Justin tweeted as soon as his plane landed in Brisbane.

Before the show started, the singer was reportedly examined by a doctor and a chiropractor - - and both advised him not to perform - - but the “Never Say Never” hitmaker pushed himself to the delight of his screaming fans.

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