Britney Spears' desertion song

Britney Spears has bared her soul in a new song in which she sings about her "baby boy" deserting her.

The track - which has been leaked on the internet - features the 25-year-old divorced mother-of-two singing a ballad over a slow beat to the sound of toy chimes.

In what appears to be a plea to ex-husband Kevin Federline, Britney sings: "Everyday, I'm in a daze/Looking for that someone

"And everyday, I sit and kneel and pray/Oh, sweet love, can I get some?

"So why do you desert me, baby boy? I need your love right now!"

The song then breaks and Britney is heard on the phone saying: "Hey baby, what time you gonna get home?"

The song ends with Britney singing: "So why did you desert me, baby boy?/I thought that you, you were the one.

"So if you preferred the other one/She won't bring you the sun."

A source said: "This is obviously just a demo and not a finished or official release in any way. It is a shame someone would leak unfinished, unmastered and incomplete work."

Britney is currently facing a custody battle with Kevin for 23-month-old Sean Preston and 11-month-old Jayden James.

The singer is rumoured to be planning to flee to London with her sons.