The actress and singer is best remembered by fans for her many movie roles including "Grease."
Preston died in July at age 57 after a private two-year bout with breast cancer.
"My daughter @ella.travolta and I dancing in memory of momma. One of Kelly's favorite things, dancing with me," he captioned the clip.
We got chills from seeing Olivia Newton-John and John Travolta dress up as their characters from "Grease" for the first time in over 40 years.
It has been the viral video everyone’s talking about: John Travolta mistaking a Louisville drag queen for Taylor Swift at the Video Music Awards on Monday night.
While presenting the award for Video of the Year to Taylor Swift for her hit song "You Need to Calm Down," Travolta mistook "RuPaul's Drag Race" star Jade Jolie for Swift. (Image Courtesy: MTV)
Julien’s Auctions, the California-based auction house, will be putting several pieces from Olivia Newton-John’s personal clothing collection up for bid in November, including the iconic "leather jacket and skin-tight pants" she wore at the finale of the hit 1978 film "Grease."