The suits certainly pushed all the right buttons, bringing in trendy producers and guest stars such as OutKast's Big Boi. But while the Rodney Jerkins-helmed "Drop the Heater" is a certified finger-popper, "Touch," overseen by the Neptunes, feels slapdash; it's the sorta thing Chad and Pharrell probably knocked off while checking their phone messages. The title cut, meanwhile, is about as generic as a slow jam gets, which hasn't prevented it from becoming a hit but will make it difficult to remember a month from now. Like its name, O looks good, but its center is hollow.