The mouth says 'you'd better work bitch' but there's still a look in Britney Spears' eyes that tells a different story entirely.

Britney Spears is in London this week, whizzing around London on open-topped buses, visiting radio stations and larking around on Twitter and Instagram. She looks and sounds better than she has in years - but Britney still troubles us slightly, and we think it's the occasional look in her eyes that simply seems to say 'help'.

The mum of two spends so much of her life posing in front of camera at red carpet events, premieres and when promoting her own work. When she turns on the charm she is dazzling - and her former problems seem a lifetime away, but occasionally she is snapped looking terrified, entirely uncertain and uncomfortable with what is going on around her.

As Britney Spears gears up for her big music comeback with new album Britney Jean, ahead of her much talked-about Las Vegas residency, take a look into the eyes of this international pop superstar and ask - Britney, do you really want to be here?