Pop star Katy Perry, who claims to be head-over-heels in love with funnyman Russell Brand, amazed onlookers at a Californian nightclub by flirting with Hollywood heartthrob
Robert Pattinson.
Perry and Pattinson spent the night flirting with each other at a mutual friend's birthday party, Radar Online reported.
The I Kissed A Girl singer and the Twilight hunk were at Dimples Supper Club in Burbank, California, and onlookers say they "only had eyes for each other".
"Sat face-to-face, touching foreheads and acting very flirty with each other. They were both giggling and Katy looked positively giddy," a source told the website.
It is not the first time Perry and Pattinson, who has an on/off romance with his Twilight co-star Kristen Stewart, have been to the karaoke venue together.
"They came here last year and every time she comes he seems to follow," a staff at the hotel said.
Although she seemed quite smitten with Pattinson, Perry did manage to find time to take to the microphone.
She belted out a Christmas track on the karaoke machine and when she and her friends took to the stage for the last song of the night, they weren't impressed with the DJ's choice of Pink's So What.
"Wrong song! No! We don't like Pink," she screamed. However, her pleas were ignored and she eventually gave up and she and her friends sang along. At the end of the evening, Perry and Robert and a friend all left for home in the singer's Audi.