brand new, an exclusive here at wwdc. marsha, the microphone is yours. >> ladies and gentlemen, for the first time on the air in the united states, here are the beatles singing "i want to hold your hand." ♪ oh, yeah, i tell you something i think you'll understand ♪ >> that song really started to take off. it was impossible to anticipate how much that momentum would continue. >> hi, everybody. all over america, this is the wwbc party go, go. ♪ i want to hold your hand >> that song was absolutely contagious. i think the teenager found a voice. >> here's what's happening, baby. the beatles! >> there was a moment where you just heard, this is our music now. it was like hearing the future. ♪ i want to hold your hand