It's interesting that Eminem chose a greatest hits album to possibly be his last. The album was released Tuesday, but many people probably already own most of the songs collected on "Curtain Call."

Eminem's breakout hit "My Name Is" was released in 1999, just more than six years ago. Some might say that's not long enough for an artist to have a greatest hits album but, hey, Britney Spears did it — and also had her first single in 1999 — so why not Eminem. Even teen queen Hilary Duff released her greatest hits album called "Most Wanted" during the summer — talk about unnecessary.

"Curtain Call" has a good mix of all the favorites and includes three new songs: "Fack," "Shake That" (featuring Nate Dogg) and "When I'm Gone." "Fack" is entertaining, but typical Eminem, and doesn't add much to the album. "Shake That" is a common booty-dance club song. "When I'm Gone" is the best new song on this album. The lyrics are good and the sound and vocals are representative of what made Eminem famous.

All five of Eminem's gold and platinum singles are on this album, along with everything else that has ever been on the Top 40 charts. Listeners can reminisce back to '99 with "My Name Is," re-watch "8 Mile" with "Lose Yourself," laugh as they remember the music video making fun of celebrities on "Without Me," report to the dance floor with "Just Lose It" and recall the powerful "Cleanin' Out My Closet" in which Eminem tells his mother he's sorry.

It's great to have all these hits on one album, especially for people who prefer Eminem's singles to the songs on the rest of his albums, but is "Curtain Call" really necessary? Probably not.

As a whole, the album isn't worth buying for fans who already own Eminem's previous albums. But for new fans or those who never got around to owning other albums, "Curtain Call" will be a good buy because the songs are a good reflection of the evolution of Eminem's career.