Jessica Simpson's Post-Partying

Jessica Simpson is seen out with best friend Ken Paves via taxicab on Monday.

The pair was seen leaving the Marc Jacobs fashion show post-party and heading to a nightclub in Downtown Manhattan, NYC.

On Tuesday, Jessica performed live for Good Morning America‘s Summer Concert Series in Bryant Park, New York City.

During the live performance, the 28-year-old singer had to stop mid-way through her song and then counted down for her band to start again.

10+ more pics inside of Jessica Simpson‘s post-partying…