(Cover) - EN Showbiz - Katy Perry and John Mayer were apparently "flirting" up a storm over the weekend.

There has been speculation that the pair are now in a romantic relationship although neither party has confirmed this.

But Life & Style claims they have received word from multiple sources that the musical duo are "definitely dating."

The pair was seen at a house party and a pool soiree. Saturday's event was littered with interesting pets.

"They were standing on the terrace on the ground level and petting all the exotic animals," a partygoer told the publication.

"Katy loved the lemur and was trying to get it to sit on her shoulders. There was an alligator, a baby raccoon and other animals.

"Katy and John never left each other's side and were flirting and affectionate the entire time. Katy loved it!"

Since her split from British actor Russell Brand, the Firework singer has been linked to supermodel Baptiste Giabiconi and guitarist Robert Ackroyd.

"I'd say Katy's more serious with John than she was with Robert," a source said. "Everyone knew they were coming together as a couple."

John has been linked to a string of Hollywood beauties including Jennifer Aniston.

"Maybe he's a changed man, but Katy likes bad boys," the source said. "I can't imagine John's changed that much." (C) Cover Media