Cover Versions: Old People

Copy, Right? has a video of Dame Shirley Bassey covering Pink's "Get The Party Started". They've made Dame Shirley look pretty good for a septuagenarian.

Can you put these cover versions in order of age disparity between original artist and the old fart making a desperate attempt at cred (from high to low)?

1. Dame Shirley covering Pink (M&S ad version, with women who aren't Shirley Bassey in lingerie)
   
2. Tom Jones covering Prince
   
3. Peggy Lee covering George Harrison ("fanvid" for the TV show "House")
   
4. Frank Sinatra covering Billy Joel (static shot of record player)