Olivia Newton-John

Olivia Newton-John's "Physical" and Debby Boone's "You Light Up My Life" both ahd 10 weeks at No. 1 on the Hot 100, putting them in a tie for the longest run at No. 1 by a female artist in the rock era. The frisky "Physical" and the chaste Boone hit make strange bedfellows, but that's rock 'n' roll.