Harmonix project lead Chris Foster accidentally revealed that Rock Band 3 will have vocal harmonies during a PAX East panel.
The statement, as reported by Joystiq, was made during a Rock Band designers - hosted panel discussion at which a ‘no Rock Band 3 questions’ stipulation was made.
However, when asked if Green Day: Rock Band songs would maintain harmonies when imported to Rock Band 2, Foster made the slip. Listing games with harmony support, he asked his fellow panel members: “We've said Rock Band 3 would have harmonies already, right?”
Realising his mistake, Foster became noticeably embarrassed.
"It's been nice working at Harmonix,” he added.