Jessica Simpson is very hit-and-miss with her style -- but yesterday in NYC, she really turned it out in every girl's best friend: A little black dress.

Jessica and boyfriend Eric Johnson stepped out to launch her new Jessica Simpson Collection at Macy's, where Jess spent hours signing autographs and greeting fans.

After the event, Jess and Eric celebrated the former quarterback's 31 birthday at Lavo.

At the end of the night, Simpson Twittered "What a great night!!! Thanks to everyone for coming out and supporting the line!"

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