Britney: 'I'm not jealous of my sister'

Pop superstar Britney Spears has slammed reports she's jealous of her sister Jamie Lynn's rising stardom - because she sees herself as a mother figure.

The Toxic beauty has stepped away from the limelight to spend more time with her new husband Kevin Federline, while 13-year-old Jamie Lynn's showbiz career is taking off, with a starring role in TV series Zoey 101.