With a new man in her life, Jessica Simpson doesn't have the blues anymore -- but she's still wearing them!

The star debuted the Jessica Simpson "Show Me Your Blues" Jeanswear collection in NYC, and wore a curve-hugging denim mini-dress (featuring plenty of zippers) of her own design.

On hand to celebrate with Simpson, 30: her beau Eric Johnson, who held on tight for one photo op. The singer/designer's little sister Ashlee Simpson-Wentz and her husband Pete Wentz also lent their support for the show. See more hot shots from Simpson's launch party.

Simpson thanked rocker brother-in-law Wentz for lending tunes for the event. "You were the best DJ ever bro!" she Tweeted.

Wentz called the night a "rad show." Tweeted another pal: "Had so much fun at the Jessica Simpson show! We rocked her new denim collection. So fun!"

Tell Us: do you like Jessica's mini-dress?