John Mayer and Katy Perry Kiss and Hold Hands in NYC!

Third time's the charm?

Katy Perry and John Mayer attended The Friars Foundation gala honoring Don Rickles at the Waldorf Astoria in New York City on Monday night, and the couple were photographed leaving the venue together holding hands.

While Mayer, 35, walked the red carpet, Perry, 28, snuck into the event, making a low-key entrance to meet her on-again beau.

“Katy arrived after the event had already started, but before dinner was served,” a source inside the party tells ABC News. “A waiter brought a chair to John’s table for her just before her arrival.”

Apparently the duo was quite “affectionate” and “very lovey-dovey."

“They were smooching and rubbing one another’s backs,” continues the insider. “And Katy had her arm around John at one point.”

[Related: Ouch! The Harsh Way Russell Brand Dumped Katy Perry]

Perry - who stunned in a silk Sally LaPointe gown - looked on adoringly as her beau performed the song "One for My Baby (and One More for the Road)."

Mayer and Perry also had date night together this past Saturday, but purposefully avoided being photographed together. The "Paper Dolls" singer and Perry hit up both the Greenwich Hotel and Bowery Hotel in NYC, but entered and exited separately. Still, witnesses say it was obvious the two were dating again.

As omg! reported earlier this month, Perry and Mayer have been spending a lot of time together since reconciling at her Memorial Day party. Sources told us they were "keeping things light and having fun" together and are just "seeing where things go."

[Related: Katy Perry Spends Her Weekend With John Mayer and Robert Pattinson]

Although Perry and Mayer were broken up when the cover girl talked with Vogue for its July issue (long lead interviews like that are done months in advance), the "Fireworks" singer admitted back when the interview took place that she was still "madly in love" with John.

"All I can say about that relationship is that he’s got a beautiful mind," Perry said. "Beautiful mind, tortured soul. I do have to figure out why I am attracted to these broken birds.”

Perry and Mayer split for the second time in March after six months of dating. They first started seeing each other in the summer of 2012 before breaking up briefly for the first time in August.

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