Singer Justin Bieber is reportedly going sober under the guidance of his pastor Carl Lentz.

According to a source, the 20-year-old is said to have turned to Lentz to help him clean up his bad habits and give up drugs and alcohol, reports femalefirst.co.uk.

"There's no one Justin looks up to more than Carl. He's had a huge influence on him," The Sun newspaper quoted the source as saying.

"They spoke at length about how he can get his life and career back on track and both agreed that getting rid of alcohol and drugs was the natural first step," the source added.

It was reported earlier that Bieber had been warned by his manager Scooter Braun, who said that he won't produce more records until he cleans up his act for good.

"Justin has made promises like this before but this time we all genuinely believe he is clean," said the source.

"His manager Scooter Braun was very clear that until Justin sorted himself out, his music comeback was on hold," added the source.