Singer/songwriter and actress Olivia Newton John passed away this week at the age of 73. She is widely known for her role as Sandy in the big-screen adaptation of the musical "Grease," where she performed "Summer Nights" with John Travolta- a song about the joys of young summer love. In honor of Ms. Newton John, share which song brings back YOUR great summer memories! #summerlovin #olivianewtonjohn #summersongs #summermusic #memories