Jessica and John celebrate in NYC

Crooner John Mayer and newly brunette beauty Jessica Simpson were spotted by the paparazzi in Manhattan Wednesday night.

John performed at Madison Square Garden and Jessica just couldn’t miss the show.
The lovebirds swarmed Jess and John after his concert.

Jessica, who was back to blonde as she worked on the set of "Blonde Ambition" Thursday, plans on joining John who is playing at the Robin Hood Foundation Charity event Thursday night,extratv.warnerbros.com reported.