A whispered "Derulo," and we're off: "It's too hard to sleep/ I got the sheets on the floor/ Nothin' on me." His determination for booty remains a wonder, from "vibrate that thing" to "look at that trunk in the back." Even the robots get into the act, chanting "let's get ugly" with suitable detachment. A mid-album stream of guests halts the bump 'n' grind, but there's so much fun to savor here, from the jabbing funk-pop of "Love Me Down" to '80s workout "Cheyenne." And his sole concession to post-Jordin Sparks gossip comes at the very end. It's called "X2cu," as in "I just want my..."