Keith Urban and John Mellencamp Collaborate at the 2015 CMA Awards [WATCH]

Keith Urban and John Mellencamp kept the energy and excitement rolling at the 2015 CMA Awards with a collaboration that mixed one of Mellencamp's best-known songs with one of Urban's newest.

Mellencamp began the set with a few lines of his song "Pink Houses," strumming his acoustic guitar, before Urban joined in with more of the verse and the chorus. As the classic rocker left the stage, the country star moved into his own "John Cougar, John Deere, John 3:16."

The song is Urban's 19th No. 1 tune for a reason: It's incredibly catchy, a bit of a tongue twister and also very clever. The song name-checks Mellencamp, also known as John Cougar Mellencamp, and is full of nostalgia, documenting the coming-of-age moments that teenagers experience.

“John Cougar references all the sort of sexual tension of teenage angst all of us were growing up in,” songwriter Shane McAnally explains of the song’s lyrics. ”John Deere represents the way that our parents worked and what we saw living in the country, and of course [there’s] the element of religion. And [there’s] irony in John Cougar starting the line and John 3:16 ending the line because that was the push and pull of that teenage thing.”

Urban and Mellencamp are just one of several collaborations happening during this year's CMAs; Thomas Rhett and Fall Out Boy and Chris Stapleton and Justin Timberlake, among others, will also perform together.

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