estimated $4 billion -- that's with a "b" -- $4 billion a year. >> i remember really being upset about this word disco. it was r&b music to me. i felt like they stripped it and gave it a new name and weren't giving credit where i think the credit was supposed to go. >> do it again. second half of the chorus but bring in the sound. that's great. one, two, three, four. ♪ tragedy >> the bee gees always liked r&b and always liked soul. i always thought they were a pop band that always had r&b leanings. >> the bee gees do what pop stars do. they really got the zeitgeist of what was going on. ♪ staying alive ♪ staying alive ♪ staying alive [ applause ] >> this is the scene outside a new york disco called studio 54. this is the place that's in with