He lost 80,000 followers on Twitter when he cut his hair, but given he had around seven million to start with, so we imagine he’s not bovvered, as they say. Justin Bieber is the latest pop star to capture the hearts of millions of teen girls worldwide and has has managed to shift millions of records thanks to being discovered by Usher in 2008. The Canadian social networking pop wunderkind arrives in town this week for his imaginatively named “My World Tour”. Cue sickly tracks such as Baby and hordes of screaming pre-teens.

The O2, Peninsula Square, SE10 0DX (0871 984 0002;theo2.co.uk) Mar 14-19. £33.75 – £40.25