News Amid cancer battle, Olivia Newton-John says, ‘I use a lot of cannabis in my healing’ April 5, 2019April 5, 2019Erin Jensen, USA TODAYComments Off on Amid cancer battle, Olivia Newton-John says, ‘I use a lot of cannabis in my healing’ "It helped me incredibly with pain and sleep,” Olivia Newton-John, 70, said in a new interview.