On Tuesday's Results Show, a fourth couple will be eliminated from the competition. Also, a special Acoustic Week features the best-selling rock band Goo Goo Dolls as they perform a medley of the first televised performance of their new single, "Not Broken" and their classic hit "Iris," plus the singer Florence + The Machine performs her hit song "Dog Days Are Over." In addition, Macy's Stars of Dance presents a number from the Tony-nominated show "Forever Tango."