>> actually, i threw everybody out of the studio, switched the lights off, made sure that the tape is running and i said, okay, let's go ahead. and i think she did it in ten minutes. ♪ oh >> the donna summer records were some of the biggest records of all-time. and they kicked off a revolution. ♪ ♪ i wanna do it till the sun comes up ♪ >> unless you have been living in a sealed cave, you probably noticed america's latest craze is disco dancing. that's dancin' without the "g." >> what's disco? >> snuffy, where have you been? ♪ i want to put on my, my, my, my boogie shoes and boogie with you ♪ >> the queen of the discos take in, what they generate with the records, we are talking about an estimated $4 billion -- that's with a "b" -- $4 billion a year.