The Chicks paid tribute to the iconic Olivia Newton-John with a cover of the Grease classic âHopelessly Devoted to Youâ at a concert on Saturday. Lead singer Natalie Maines called Newton-John a âworldwide sweetheartâ during the Chicksâ concert at the Gorge in Washington State. âI thought I was Olivia Newton-John from like [ages] 4 to 12, and then I just wished I was Olivia Newton-John,â Maines admitted while introducing the cover. âSo we worked up today at soundcheck a little Olivia Newton-John song.â Newton-John died on August 8 at the age of 73, after a years-long battle with breast cancer. Watch the Chicksâ cover of âHopelessly Devoted to Youâ below.