Ashlee Simpson's fun weight gain

Ashlee Simpson-Wentz had an ''awesome'' time gaining weight when pregnant with her son Bronx because she got to eat lots of naughty food.

Ashlee Simpson-Wentz had an "awesome" time gaining weight when pregnant with her son.

The 'Pieces of Me' singer gave birth to little Bronx in November 2008 and says she was very relaxed with her eating regime while carrying him so indulged in lots of naughty treats.

She said: "I gained 50 pounds, which was awesome! I ate cake and cupcakes. I had a blast!"

However, Ashlee - who is married to rocker Pete Wentz - has now regained her super-slim figure with the help of Reebok EasyTone shoes, which claim to tone thighs and butts just by wearing them.

She told website E! Online: "When I wanted to get back into shape, I worked out and these shoes are amazing because you can really feel them in your booty. But I also worked out and ate healthy."

Ashlee also uses Bronx to help tone her up as well as making the most of the time he's asleep to get in some other form of exercise.

She said: "I carry Bronx, and he's 33 pounds so I get my workout in!

"I try to hit the gym for 30 minutes while Bronx is napping."