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The Chicks were paying tribute to Olivia Newton-John by performing one of the late singer's most beloved hits.
On Saturday, Aug. 13, the band delivered a rendition of "Hopelessly Devoted to You" as part of their concert in Washington.
"We lost a worldwide sweetheart last week, Olivia Newton-John," said Natalie Maines. "I thought I was Olivia Newton-John from like 4 to 12, and then I just wished I was Olivia Newton-John. So we worked up today at soundcheck a little Olivia Newton-John song."
Newton-John originally performed the song in the movie version of "Grease", which hit screens in 1978.
Listen to the crowd's reaction. I don't think there was anyone in that audience who didn't join in and sing.
Sent goose bumps down my spine.