Jessica Simpson working out for new bikini line launch?

Jessica Simpson is set to launch her bikini line next week, December 30. Photo/GQ

Jessica Simpson has been hitting the gym hard with new trainer Mike Alexander and tweeting of sore buns, but has the celebrity singer, actress and fashion designer been working out to fit into her new bikini line?

According to People.com, the 29-year-old is teaming up with bikini line Red Carter to come out with a collection inspired by J.Simp's lluxury vacations.

The bikini line, to be launched next week (December 30), is described as "fun and flirty" by the star and had her mother Tina's input for fashion and design.

Of her upcoming bikini line, Jessica said, “My collection was inspired by my favorite vacations and the jet-setting getaways I dream about. It is fun and flirty, but still so classic." For how Jessica Simpson whittled her middle for Daisy Duke's, click here.

More articles on hot Jessica Simpson and sister Ashlee Simpson-Wentz...

• Jessica Simpson weight loss: 'Jessica can lose 7 pounds in a week'
• Jessica Simpson's personal trainer gives her 'pouty face and sore buns'
• Jessica Simpson promotes Dukes of Hazzard personal trainer Mike Alexander (VIDEO)
• Jessica Simpson flashes hot bikini body in front of party guests in Vegas!
• Ashlee Simpson stands up for sis: 'Stop calling Jessica fat!'
• Ashlee Simpson-Wentz loses weight for 'Melrose Place' with famous 'Baby Bulge Be Gone' workout

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