BRITNEY SPEARS reveals a rear-ly pleasing side of herself in these pics, which have only just come to light.

Taken just five days before the popstar's now infamous head-shaving incident in February, Brit leaves little to the imagination in an impossibly teeny thong.

Partying with palls at the Club One nightclub in New York city, the troubled 25-year-old mum-of-two dived backstage to chat with the night spot's resident dancers and ended up stripping down to her smalls in the process.

Brit, whose increasingly erratic behaviour, most recently at a photoshoot for OK! Magazine, has been a constant source of worry for those close to her, seems happy and relaxed in these playful shots.

She certainly seems contentto have her picture taken with these two dancers, one of whom sports a thong even tinier than her own.

Less than a week later she was to stun onlookers at a tatoo parlour in San Fernando, California, by taking a set of clippers and shearing her locks entirely off.