Los Angeles, Nov 14 (IANS) After divorcing British comedian Russell Brand, singer Katy Perry is now dating John Mayer.
Insiders say she is "obsessed" with him and they are "full on dating".
Perry was spotted being very affectionate with the singer at a birthday bash Saturday night.
"John had his hand on Katy's back a lot, and they were kissing and holding hands," contactmusic.com quoted a source as saying.
The couple's date at the party is just the latest in a string of romantic high profile outings for the duo since they rekindled their romance in September following a brief split in August.
A source previously revealed that they barely acknowledged other guests at Katy's 28th birthday party last month because "they were in a world of their own."
"She didn't even talk to her friends much. It was just her and John. She's obsessed with him. She said hello to people but then went right back to him," said the source.
Mayer, 35, has previously romanced Taylor Swift, Jessica Simpson, Jennifer Aniston and Jennifer Love-Hewitt.