Singer turned actress Christina Aguilera has revealed that having her son Max has inspired her to take part in charity work.

In an interview with InStyle, the yummy mummy revealed that becoming a mother made her want to help children less fortunate than her own.

The 'Burlesque' star who is an ambassador the UN's World Food Programme said: "After I became a mum, I felt passionate about the fact that no child should go hungry. Food is not a luxury.

"Through my involvement. I've helped the WFP raise $12m- that's a staggering 43.5 million meals. I've seen swollen bellies and hair that's turned white from lack of nutrition, and yet some of the people I've met have such optimism it's incredible. One kid in Haiti was telling me how he adores school. He never misses a day, he dreams of becoming a doctor."

She continued: "That sort of thing makes you want to work that much harder for those kids who truly want to succeed and rise above whatever they're going through."