Jessica Simpson has been very open about her struggle to lose weight after she gave birth to her daughter Maxwell in May. Well, it looks like her hard work to shed pounds has finally paid off.

The singer/actress showed off her slimmed-down figure at Macy's South Coast Plaza while promoting her Jessica Simpson Girls Collection. She wore two items from her clothing line - the "All Aboard" Starry Night bow-tie blouse and "Paradise Flare" black pants.

Jessica is a spokesperson for Weight Watchers, and from May to September she dropped 40 pounds of post-baby weight. Two months ago she was still carrying a few extra pounds when she appeared on Katie Couric's talk show.

Her sister Ashlee, who is co-creative Director for Jessica Simpson Girls, also attended the Macy's event. She wore "Kiss Me" coated tie dye leggings and an off-the-shoulder sheer striped sweater.

See more photos of Jessica and Ashlee...