Wiz Khalifa

US rapper Cameron Jibril Thomaz, whose stage name means 'wisdom successor', brings his stoned hip hop to the UK. His fifth album is due this year, as is a second collaborative album with Snoop Dogg – a level of productivity that's even more impressive when you take into account what Khalifa claims is a $10,000-a-month weed habit. He even has his own brand of 100 per cent hemp rolling papers.