The Chicks paid tribute to the late Olivia Newton-John over the weekend, performing a live cover of ‘Hopelessly Devoted To You’.The band played the classic song – performed by Newton-John’s character Sandy in the 1978 film Grease – during their Washington state show at the Gorge Amphitheater on Saturday (August 13). Before performing it, lead singer Natalie Maines paid homage to Newton-John, who died last week, in a speech.“We lost a worldwide sweetheart last week: Olivia Newton-John,” she began.