Justin Bieber's grandmother has suggested the star put on a free concert after disappointing fans with his late arrival in London earlier this week.

The Canadian superstar has been plagued by a number of disasters in the UK capital recently, with a scuffle with a cameraman earlier this week the latest negative story to hit the headlines.

Bieber was blasted for his "disgusting" behaviour after turning up late for the first of a string of shows at London's O2 Arena.

His grandmother Kathy, 56 told the Daily Star Sunday newspaper that the 19-year-old star should make amends.

She explained: ''I don't think for one moment this is all about him being a bad boy. He's only just turned 19 and he's still learning to cope with the pressures of fame.

''But it's worrying. You read all sorts of things about him partying and he needs to understand some of those so-called friends probably don't have his best interests at heart.

She added: "I know he will be feeling depressed about the way things have gone in London, so maybe it would be a good idea if he were to go back there later and perform free for the fans who feel let down by him.''

Listen to Bieber's 'Right Here' below: