LAS VEGAS, NV - JANUARY 03: Entertainer Olivia Newton-John (L) and actress Didi Conn appear after they performed "Summer Nights" together at Flamingo Las Vegas on January 3, 2015 in Las Vegas, Nevada. (Photo by David Becker/WireImage)
LAS VEGAS, NV - JANUARY 03: Entertainer Olivia Newton-John (L) and actress Didi Conn appear after they performed "Summer Nights" together at Flamingo Las Vegas on January 3, 2015 in Las Vegas, Nevada. (Photo by David Becker/WireImage)