Britney Spears confirms tour

Britney Spears has confirmed a US tour.

Asked about her tour plans during On-Air with Ryan Seacrest, she confirmed: 'Yes, I'm supposed to be going on a tour.

'(In the) US in the early summer.'

It will be first the tour since her 2009 'Circus' tour.

She also said that she liked new single 'Till The World Ends' because 'I'm a vibe person. It puts me in a good mood.'