Hi everyone, I'm learning Mariah Carey's All I Want for Christmas is You. I got the sheet music off musicnotes, but the piano part sounds pretty basic and unimpressive. There are some nice versions on YouTube like this one (http://www.youtube.com/watch?v=bwQjUODtHBU) but I've never improvised before so I was wondering if anyone knew of a better version or could give me some advice to make it sound better? Thanks