Album: Relapse

On 2009’s Relapse—his first solo album since 2004's Encore—Eminem didn't feature many guest appearances. There were plenty of Shady artists he could have turned to, but for the most part, he went at it alone on the project. However, for the album's promotional single, he did call on Dr. Dre and 50 Cent to recreate the magic that the three had captured on 2004's "Encore." And while "Crack a Bottle" wasn't quite as strong as that one was, it was a way better track than the album's first real single, "We Made It," and reminded people that Em, Dre, and 50 were still riding together, despite the long break that Slim Shady took from making music.