Rival Sons: Watch Them Cover Olivia Newton-John’s ‘Hopelessly Devoted to You’

Rival Sons once covered an Olivia Newton-John classic, and it's truly stunning.

The cover is a stripped-down version of "Hopelessly Devoted to You" from the 1978 movie musical Grease. Rival Sons singer Jay Buchanan and guitarist Scott Holiday performed the cover for a video feature for Paste Magazine. Simply put: Buchanan belts the hell out of the ballad.

Newton-John died on August 8 at the age of 73. An exact cause of death was not confirmed, but the singer/actress had on-and-off bouts with breast cancer since 1992.

News of her death led to a number of tributes. Most notable among the tributes was one from her Grease co-star John Travolta. The actor shared via Instagram, "My dearest Olivia, you made all of our lives so much better. Your impact was incredible. I love you so much."

He added, "We will see you down the road, and we will all be together again. Yours from the first moment I saw you and forever! Your Danny, your John!"

Olivia Newton-John and her sudden death on August 8 have caused fans to download her music in staggering numbers.

Per Kworb.net, Newton-John currently has 11 of the top 20 most downloaded songs on iTunes in the United States. On top of that, seven of the top 20 albums downloaded on iTunes in the United States are Newton-John albums. The soundtrack to Grease is currently on top of that chart.

Newton-John is no stranger to hits. She had 40 songs chart on the Billboard Hot 100 in her career. Of those songs, 27 of them were top 40 hits, and five of them went to number 1. Those number one hits were 1974's "I Honestly Love You," 1975's "Have You Never Been Mellow," 1978's "You're the One That I Want" (with John Travolta), 1980's "Magic" and 1981's "Physical."

So, which tracks are fans seeking out to honor the pop star/actress? Scroll below to see which Newton-John songs are seeing an increase in downloads and where they're ranked!

Currently sits at #18 on the iTunes charts in the United States.

Currently sits at #17 on the iTunes charts in the United States.

Currently sits at #16 on the iTunes charts in the United States.

Currently sits at #15 on the iTunes charts in the United States.

Currently sits at #10 on the iTunes charts in the United States.

Currently sits at #8 on the iTunes charts in the United States.

Currently sits at #7 on the iTunes charts in the United States.

Currently sits at #6 on the iTunes charts in the United States.

Currently sits at #4 on the iTunes charts in the United States.

Currently sits at #2 on the iTunes charts in the United States.

Currently sits at #1 on the iTunes charts in the United States.