Katy Perry and John Mayer at Dinner on His Birthday in NYC

Katy Perry and John Mayer continued his 35th birthday fun in NYC last night. After Katy and John lunched at ABC Kitchen, they had dinner at Freeman's and wrapped things up with a night of clubbing at The Box. Katy's romantic few days in the Big Apple allowed her to have an emotional experience at Saturday's Night of Too Many Stars gala to benefit autism research. She took the stage to sing with a young girl suffering from autism, and later tweeted that the experience was "the most important moment thus far of what I do." Next up for John will apparently be a trip to South Carolina. John Mayer's expected in Charleston at the Southern Ground Music & Food Festival to play with the Zac Brown Band.