Pop sensation Katy Perry and serial dater/musician John Mayer have been seen together yet, again. According to US Weekly, the duo was spotted leaving a house party on Saturday in Los Feliz, Los Angeles.

This isn't the first time the star-studded pair has been caught by the paparazzi. In fact, rumorville has been a buzz ever since their June 19 rendezvous at Soho House in West Hollywood. An Us Weekly observer said, "They were affectionate, holding hands and cuddling!"

The pair was seen on August 1, not so secretly leaving the Chateau Marmont in West Hollywood, TMZ reported.

But it doesn't seem that Perry has given her heart away just yet. The 27-year-old is also rumored to be casually dating musician Robert Ackroyd. Us Weekly reported that Perry had been crushing on Ackroyd ever since the New York City Goldbar event on Sept. 11, 2009. An US Weekly observer claimed Perry was determined to make her move. According to another US Weekly source, "She nailed down her crush!"

And with 34-year-old Mayer's bad boy reputation, who can blame her? He's had relationships and flings with some of Hollywood's leading ladies including (newly engaged!) Jennifer Aniston, Jessica Simpson, Jennifer Love Hewitt, Taylor Swift, and Minka Kelly.

According to an US Weekly source, Mayer and Perry are just hookup buddies. Perry might still be reeling from her divorce with comedian Russel Brand, which wasn't finalized until June 16.

Tags: Katy Perry Russell Brand John Mayer