Millionaire Britney laments 'cruel world'

Britney Spears today defended her parenting and hit back at her critics, lamenting "how cruel our world can be".

Spears, always photographed but rarely interviewed these days, also spoke about her new album 'Blackout' during the seven-minute radio talk, during which she giggled frequently as her assistant, Alli Sims, and friend, Sam Lufti, laughed and shouted in the background.