Beyoncé Knowles wants to look "even more amazing" following the birth of her daughter Blue Ivy.
The stunning songstress and her husband Jay-Z welcomed their first child into the world in January.
Beyoncé has since stepped out showing off her impressive shape, and even flaunted her enviable post-pregnancy body in a black one piece swimsuit in St Barts last week.
However, sources close to the star says she wants to continue on her baby body blitz.
"She's been strict with her diet and says she has to be, as she finds controlling her weight a struggle. She's nearly lost all of the 40lbs. she gained during pregnancy, but still wants to lose more," an insider told British magazine Closer.
"Beyoncé knows she looks great for a new mum but, being a perfectionist, she wants to look even more amazing. With her exercise regime, she's focusing on her stomach and chest, as she feels they were the areas most affected by pregnancy. She's doing 300 crunches a day.
"She's determined to be a [UK] size 10 all over, which is as slim as she's ever been. She started slowly, a month after the birth and built up to five days a week."
Beyoncé has reportedly enlisted the help of friend and mother-of-two Gwyneth Paltrow, who is famed for her svelte figure.
The 30-year-old singer has been getting advice on the best beauty products.
"Pal Gwyneth Paltrow has also been advising her about treatments and creams to help her get into the best possible shape," the source added.