Britney Spears has delighted fans by announcing the dates of the North American leg of her upcoming world tour - and she plans to take in twenty different cities.

The Toxic hitmaker, who released new album Circus on her 27th birthday, last week announced her only two European dates in London for June.

And now Spears has confirmed the dates her American fans have been waiting for.

She'll be performing in cities including Los Angeles, Dallas, and Washington on the tour that kicks off in March and runs through until the end of April.

And fans are in for a double treat - The Pussycat Dolls will be supporting the singer.