Seems that being one of the hottest young stars around isn’t enough for Pattinson.Robert Pattinson started learning the piano at just three years old and picked up a guitar soon after that.He and talented big sister Lizzy, who performed backing vocals in Twilight, are now collaborating on an album.’Rob has always been so supportive of Lizzy,’ a family friend tells the Sunday Express.’They’re really close, so it’s nice they are working together.’He’ll always turn up at her gigs if he’s around, but he’s seriously talented in his own right.’When Robert, 25, was younger, Lizzy used to dress him up as a girl and call him Claudia!