After the artistic and commercial flop that Glitter was, many believed Mariah Carey had lost her touch. Then in 2005, the world listened in shock as she released The Emancipation of Mimi, garnering 10 Grammy nominations, three wins and perhaps most importantly, for an artist in her 30s, street cred. E=MC? may have come three years later, but it proves Carey still has her finger on the pulse. Opener Migrate (featuring T-Pain) and Cruise Control (with Damian Marley) are club hits in the same vein as It's Like That and Say Somethin' from the last album - wannabe hip hop stars will be on the dance floor as soon as the first notes are played. The inanely-titled I'll Be Lovin' U Long Time is an incredibly catchy disco-tinged number that deserves to convert the cynics. It's not all good, though: I Stay in Love has irritatingly simplistic keyboard backing which detracts from the pretty lyrics and most Mariah-like vocals on the album. Bye Bye is in the same vein as One Sweet Day, a memorial to lost friends. But unlike that moving spiritual, it comes off as merely irritating: a teenaged songwriter's attempt at sincerity. Hero-era fans and lovers of the seven-octave range will find little to enjoy here. But if you know her best as Mimi, E=MC? will keep you hooked.