Rock Band 3 to have vocal harmonies, Harmonix (accidentally) confirms

At Harmonix's PAX East 2010 panel, five Rock Band designers answered questions from the audience for "An Awkward Hour" with one major stipulation: No questions about Rock Band 3. However, when an audience member inquired whether Green Day: Rock Band songs would still have harmonies when imported into RB2, Harmonix Project Lead Chris Foster began listing off the games with harmony support. "We've said Rock Band 3 would have harmonies already, right?" Foster asked his fellow panelists, who responded with a booming, "No!"

Foster clammed up without revealing more details about Rock Band 3's harmonies (or even answering the attendee's original question), only mentioning, "It's been nice working at Harmonix." (We think he was joking about that last part.)