Singer Britney Spears performs during Madonna's "Sticky and Sweet" tour at Dodgers stadium in Los Angeles in this November 6, 2008 file photo. Spears says her life is so dull under her father's watchful eye that she feels old and boring. With her new album "Circus" out next week, the 26-year-old singer is working on a comeback after seeing her life spiral out of control with a run of strange behavior, a bitter custody battle over her two sons and the loss of her rights to administer her own affairs. [Agencies]

Pop star Britney Spears will cancel her 'Circus' tour unless her children can accompany her.

The 'Womanizer' singer is reportedly refusing to go on the 33-date tour if her ex-husband Kevin Federline's lawyers continue stopping her from taking their children - Sean Preston, three, and Jayden James, two - with her.

She will also pay for her ex-husband's accommodation. It is claimed the singer has further agreed to pay Kevin over $4,000 a week during the tour so he can stay near the children, although his lawyers are reportedly opposed to the plan. 'The Circus Starring Britney Spears' tour is due to kick off in New Orleans, US, on March 3.

After shows in North America, Britney is set to perform eight concerts in London, England in June.