Olivia Newton-John

Australian singer and actress Olivia Newton-John was one of the most successful vocalists of the 1970s. This four-time Grammy award winner landed five songs on the top of the Billboard Hot 100 singles charts – “I Honestly Love You,” “Have You Never Been Mellow,” “You’re the One That I Want,” “Magic,” and “Physical.” Who can forget Olivia’s turn as Sandy in Grease, the international hit movie that also included the smash singles “Hopelessly Devoted to You,” and “Summer Nights.”