David Guetta's explosive Nothing but the Beat was the album so nice he released it twice. For this 2.0 version, the tracks are shuffled (smash singles "Titanium" and "Turn Me On" are sequenced up top) and Guetta adds a few extras. Superstar siren Sia reteams with Guetta for "She Wolf (Falling to Pieces)," which contrasts synth pyrotechnics with the New Zealand vocalist's confessional lyrics. Indie poppers Tegan & Sara lend their summery vocal harmonies to "Every Chance We Get We Run," while the Swedish duo Taped Rei sing on Nothing but the Beat's eighth single, "Just One Last Time." Finally, not to be missed is Guetta's rousing Daft Punk impression, "Alphabet."