A cover song and a Christmas song make up two of the best Kenny Rogers duets with Dolly Parton. This Top 5 list also includes a timeless country collaboration and a relatively new offering.

With the famous friends set to perform together for the last time at Rogers' all-star farewell concert in Nashville this October, it's tempting to reminisce over their best songs together. Who can resist?

"Islands In the Stream" was first, but across three decades Parton and Rogers have recorded dozens of songs together. Their Once Upon a Christmas album from 1984 is a holiday standard — their song "The Greatest Gift of All" is an all-time Christmas duet! Later recordings might be forgotten, but only because newer music replaced them in the folds of one's memory.

Making the list is Parton and Rogers' most recent duet, "You Can't Make Old Friends." The 2013 reunion came 30 years after they first recorded the famous love song together, and they proved their claim that time does not add rust to a great friendship. "Real Love" from Parton's 1985 album of the same name makes this Best Rogers and Parton Songs list. So does their cover of Mickey & Sylvia's "Love Is Strange." The country version keeps the integrity of the '50s R&B classic while making the song accessible to a new generation.

No, we're not likely to hear any new Kenny Rogers and Dolly Parton duets now that Rogers is retiring, but this playlist is enough to remind us why the pair is considered among the best ever. Listen to each and then decide what your No. 1 is. Let us know what we missed in the comments section below.

See Dolly Parton Photos Through the Years!

  • 5

    "Love Is Strange"

    From 'Love Is Strange' (1990)
  • 4

    "Real Love"

    From Parton's 'Real Love' (1985)
  • 3

    "The Greatest Gift of All"

    From 'Once Upon a Christmas' (1984)
  • 2

    "You Can't Make Old Friends"

    From 'You Can't Make Old Friends' (2013)
  • 1

    "Islands In the Stream"

    From 'Eyes That See In the Dark' (1983)