Britney SpearsBritney Spears may have her sons with her on her new tour - but they’re reportedly banned from seeing the show.

The singer kicked off the North American leg of her Circus tour in New Orleans on Tuesday. Under an agreement worked out with ex-husband Kevin Federline, the couple’s sons three year old Sean and two year old Jayden will follow the star around the country, staying in one of three bases, for the duration of the 36 show tour - but the toddlers will not be allowed to see their mum on stage because it’s too risque for them.

A source told the Mirror the boys were invited along for a rehearsal before opening night on Tuesday but they had to leave early: “It was great for Brit to have the children around.

“There is so much riding on the tour that she had worked herself up and her nerves were getting to her.

“Seeing the boys before her big night helped to relax her. She let them see most of her numbers in rehearsals, but the really sexy ones she left until the late-night run throughs when they had gone home.”

Britney performs in a number of skimpy outfits in the show including hot pants, bra tops and a sparkly leotard designed to make her look like she’s just wearing nipple tassles.