Katy and Robert belted out Boyz II Men's hit in 2008

Katy Perry and Robert Pattinson look very cosy together in a funny video that’s emerged from a karaoke night five years ago.

The pair – who are good pals – were celebrating a friend’s birthday in 2008 when they decided to duet on Boyz II Men‘s saucy hit I’ll Make Love To You.

Robert, 27, grabs Katy‘s hand as he sings lyrics such as: ‘Girl your wish is my command, I submit to your demands’.

Katy, 29 – who’s perched on a stool next to a lower-down Rob – then shouts: ‘This chair is too high to make love’ and sits on the actor’s lap.

British heartthrob Rob – who starred in the first Twilight film with ex-girlfriend Kristen Stewart that year – grins as he puts his arm around Katy‘s stomach.

Katy and Rob look like they’re having a pretty good time at the bash and hold glasses as they jokily perform their tune.

Both are dressed in low-key outfits, with Katy wearing a grey long-sleeved top and a trapper hat while Rob dons a brown leather jacket. 

Watch Katy Perry and Robert Pattinson singing together…

SEE PICTURES Russell Brand and Katy Perry – a love story in pictures

SEE PICTURES Katy Perry joins Kristen Stewart at Nickelodeon Kids’ Choice Awards

SEE PICTURES Katy Perry rocks wacky wig – see stars whose hair isn’t real

Anna Duff