Recent covers, in reverse chronological order:

[alexist]

(found a back issues page)

Mary-Kate & Ashley Olsen
Ruben Studdard
Angelina Jolie
Eminem
Clay Aiken
Justin & Christina
Monsters of Rock (can't identify everyone in the photo, it's a small image)
Ashton Kutcher
American Icons (35th Anniversary Special)
Good Charlotte
Lisa Marie Presley
50 Cent
Avril Lavigne
Phish

There's a pathetically small number of decent artists on that list.