They then pretty much confirmed they were working on a Dolly tribute when they uploaded a picture together wearing matching Dolly Parton leather jackets.
The tribute started with Kacey and Katy, the first in big diva hair and the second in small, trading verses of Dolly's award-winning 1977 single "Here You Come Again" before Dolly herself joined the singers.
The country singer added that Parton is "a total pro", playfully noting: "She and I are the same height!"
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But the sentence McArthur ended up receiving Friday, the Associated Press says, was the most lenient option on the table. Families and friends of the respective men were not given the closure that they deserved in a timely manner.
Parton has been confirmed to be one of the performers at the Grammys. The Grammys previously paid tribute to Parton in 2011, when the legendary singer and songwriter received a Lifetime Achievement award: Keith Urban, John Mayer, and Norah Jones teamed up to perform a rendition of "Jolene".
The 2019 Grammys ceremony also saw Jennifer Lopez perform a tribute to the Motown record label.
"Of course, you know we hillbillies need MusiCares too", she told the audience. "Well, not them", Parton said in her Friday acceptance speech while receiving the MusiCares award. Blending their vocals, Miley kept the melody while Dolly dazzled on her harmonies - but the best harmonizing came right after.
Numerous musicians who performed with Parton on Sunday night were also at Friday's ceremony. "We may not have sex, drugs and rock 'n roll, but two out of three ain't bad".
The moment was incredibly special as Dolly and Miley were able to perform on the Grammy stage together and it sure to be a memory both will treasure for the rest of their lives.