March 15, 1975 - 40 Years Ago Today: Olivia Newton-John went to No. 1 on the Billboard 200 chart with her album, "Have You Never Been Mellow." This was the second consecutive No. 1 album for Newton-John and it came one week following the No. 1 peak of its title track and leadoff single on the Hot 100 chart. Olivia Newton-John has scored 20 albums on the Billboard 200 chart which include 12 inside the Top 40 including five Top Tens and two No. 1's. On the Hot 100 chart, she has scored 41 singles which includes 28 Top 40's, 15 Top Tens and five No. 1's.