>> it was the time when everybody was getting involved and everybody was expressing themselves loudly. we are having the best time ever. ♪ never gonna give you up ♪ never gonna let you down ♪ never gonna run around and desert you ♪ >> every audience needs to get fed. you know, we'd fed the pop audience. but where's the rock 'n' roll? ♪ oh, we're halfway there ♪ oh, living on a prayer ♪ take my hand ♪ we'll make it i swear >> bon jovi comes in with a huge record. ♪ pour some sugar on me >> def leppard. fantastic record. ♪ pour some sugar on me >> and that begins to bring that kind of music back. ♪ pour your sugar on me >> at the end of the '80s, everybody came to the same conclusion simultaneously.