(Cover) - EN Star Style - Jessica Simpson thinks her fashion business is so successful because of her curvy figure.

The actress-and-singer has an eponymous line of clothes, shoes and accessories which is so popular it is rumoured to be on course to net $1 billion this year. Jessica is proud of how successful the range is, and thinks its down to her knowing what suits women.

The 30-year-olds physique has been hotly debated over the years, and she has been regularly criticised for putting on weight. Jessica doesnt listen though, as she thinks her changing figure makes her a hit with fans.

I can look at any dress and say, 'That's going to work', or, 'That's not going to work, she explained.

The star is known for having a large bust, which also informs her fashion choices. She doesnt mind showing off some cleavage, but is always careful that what she wears fits properly.

I really want to be comfortable, especially on stage because I don't want my gown to pop open when I hit a big note. I think all women just want to be comfortable with what they wear, she added. (C) Cover Media