Katy Perry is dating John Mayer. The "Wide Awake" singer was seen enjoying a romantic meal with the "Gravity" singer at the Chateau Marmont in Hollywood last night, and onlookers say they looked totally smitten with each other.

"They were holding hands across the table, sneaking kisses, and laughing," one source told Us Weekly. They were then pictured leaving the exclusive venue in John's car.

However, sources the pair - who have been seen out together on a few occasions over recent weeks - aren't serious about each and are just having fun. "They're just hooking up right now. It's not serious - yet!" a source added.

Katy - who had been seeing Florence + the Machine guitarist Robert Ackroyd - recently said she was waiting for a man to woo her. "I'm a woman who likes to be courted, strongly. Never say never, I guess you'd say. I'll let love take the lead on that," the 27 year-old pop beauty said.

John has previously dated Jennifer Aniston, Cameron Diaz and Jessica Simpson.