This retrospective, which arrives sporting a title that indicates there might actually be something to all those rumors about Mister Mathers bowing out of the rap world, does a mighty fine job of laying out the legacy he's created so far. The songs on Curtain Call, largely culled from Eminem's first two albums, showcase the blend of humor and menace that helped him fill arena mosh pits and prompt conservative groups to circle the wagons. Songs like the nose-thumbing "My Name Is" and "The Real Slim Shady" (flip sides of the same guessing-game coin he's so fond of tossing in the air) and "Stan" (one of the most genuinely creepy narratives to hit the airwaves in ages) show both his flair for hairpin lyrical turns and his note-perfect comic timing. Those elements drift in and out of all of Em's offerings -- colliding head-on in "Without Me" -- making the tenth listen as arresting as the first. Curtain Call is punctuated with four never-before-released tracks -- highlighted by the Grammy show duet with Elton John (who took the Dido part on "Stan") and the groove-laden "Shake That" (which features a cameo by Nate Dogg). If this really is his final curtain call, Eminem can -- at the very least -- honestly echo Sinatra's claim that he did it his way.