With Confessions, Usher puts out his most intimate thoughts: “Burn,” “My Boo,” and the raw, vulnerable title track are ripped from his tear-stained diary. Emerging from the salty pool of regret, he’s ready to party. “Yeah!” (with Lil Jon and Ludacris) may be Usher’s most explosive single ever, merging the Atlanta crunk craze with pop, while “That’s What It’s Made For” is a hip-swiveling pleasure how-to.