Britney Spears wants custody of sons

London: Pop princess Britney Spearsreportedly wants to apply for sole custody of her two sons,who are currently under the care of her ex-husband KevinFederline.

The Toxic hitmaker, who has Sean Preston, five, andfour-year-old Jayden James with Federline, wants to have theboys live with her and current partner Jason Trawick, reportedContactmusic.

Federline, who divorced Spears in 2007, officially hassole custody of the boys, although the youngsters split theirtime between both parents.

"It's getting harder and harder for her to hand theboys back to Kevin after each visit. Britney dreams ofmarrying Jason and having the kids live with them - she'd evenlike to have more children too," said a source.

The 28-year-old singer, who is under the conservatorshipof her father Jamie Spears since her much-publicised breakdownin January 2008, wants to live an independent life withTrawick.

"She won't be happy until the boys are with herfull-time. All she wants is to get her life back, withouthaving to ask her dad's permission to do everything," thesource said.

However, Federline has told Spears - who sees the boysevery week - he wants to keep custody of their sons, who livewith him and his girlfriend Victoria Prince in Los Angeles.

"Britney and Kevin's relationship is amicable - Kevinlikes Jason and knows he's a stable influence on Britney. He'stold her she can visit them every day but there's no way he'shanding them over full time," the source added.