The rumors were true! The grand opening of the Microsoft Press Briefing featured a rousing rendition of "Day Tripper," as played by the Harmonix House Band on their upcoming moptopped rhythm title, The Beatles: Rock Band. Said house band featured three singers, who harmonized brilliantly -- the game will apparently keep track of three different singers' performances as they attempt to mimic the band's catchy harmonies. Good luck finding three friends with the guts to pick up the Rock Band mic! They're a rare, rare breed.