WATCH: Dolly Parton sings 'Amazing Grace' with Glen Campbell on the bagpipes in 1988

This Saturday, we're throwing it back to 1988 ... to when country music legends Dolly Parton and Glen Campbell teamed up as part of her network variety series, Dolly, to perform a stunning cover of 'Amazing Grace.'

The rarely-seen performance is part of a new box set titled Dolly: The Ultimate Collection, which encompasses 19 DVDs offering 35 hours of footage looking at Parton's life and career.

"It's been an amazing journey and you'll find some of my most precious highlights included here in this collection," Parton said about the box set.

"Thank you to the wonderful folks at Time Life for putting this together. What a delightful trip down memory lane … just the hairstyles and outfits alone are worth a look and I'm surprised there are still any rhinestones left in this world!

"I hope you enjoy these moments as much as I did."