The Latino singer, who gave birth to twins Max and Emme in February, is reportedly losing up to 10lbs a week by getting up at 4am and hitting the gym in a bid to regain her famous figure.

A source told Britain's Closer magazine: "Jennifer has always been a workaholic and she has applied the same attitude to her post-pregnancy regime. Because raising twins is so demanding, she gets up at 4am to fit it all in.           

Jennifer, who is married to singer Marc Anthony, is also believed to have cut all carbohydrates from her diet and is surviving on 1,400 calories a day. She is eating only high-protein steamed fish or chicken and fresh vegetables.

The source added: "Jennifer doesn't allow herself any sugar, caffeine or alcohol and she only drinks purified water." // Newsdesk