The two lovebirds were spotted hanging out at Disneyland today with a group of friends. Perry and Mayer were each dressed casually, with the pop singer wearing shorts, a T-shirt and floppy hat, while rocker Mayer donned a baseball cap, plaid shirt and jeans.
A source tells E! News that the couple was with a handful of other people and didn't engage in too much PDA, but stayed close together.
Mayer recently opened up to Jimmy Kimmel about his duet with Katy called "Who You Love" on his upcoming album Paradise Valley.
When asked what it was like to work together in the studio, the singer gushed, "She was fantastic."
"It was a really great experience and the song is one of these like old FM '70s and '80s sort of like duets," he said. "And I listened back to it, it's like, really convincing. And I watched it get made and I'm still kind of taken aback."