Watch Katy Perry sit on Robert Pattinson's lap as they sing a karaoke duet after a few beers

The singer and her Hollywood star friend singing Boyz II Men's famous love song I'll Make Love To You at a karaoke bar in 2008. The footage that was uploaded on YouTube on Friday night has gone viral as the duo have been rumoured to be more than just close friends for a very long time. This allegation has been denied by both Katy Perry as well as Robert Pattinson. The footage shows the friends drunk as they sing with Katy opting to sit on Robert's lap to 'make love' in her own words in the video.