Rolling stones rocker Keith Richards thinks Justin Bieber's music is "a load of crap". The 71-year-old guitarist has admitted he's unimpressed with modern pop stars, describing Justin and Taylor Swift as little more than the "flavour of the month". He explained: "Taylor is a pretty girl. I don't think about the competition. I mean they're the flavour of the month, aren't they?" Keith said he found Justin to be "quite humble" when they met, but thinks his attitude is a reflection of his uninspiring music. The Rolling Stones legend told GQ magazine: "Justin Bieber? Actually I met this guy and found him quite humble, as he should be. "His music? I mean it's a load of crap isn't it?"