"Your vote is your voice," she says in the spot.
The impromptu performance took place at a Kentucky steakhouse.
Many of SESAC's top country and Americana songwriters and affiliates were honored at the Country Music Hall of Fame and Museum.
One Spark Entertainment's initial clients are Sara Evans and Everette.
The country superstar will start a run of shows at Zappos Theater March 3.
"I've admired her all these years," Parton said of Swift, who took over the entire Hot 100 top 10 with songs from Midnights.
She becomes the first and only female member in the eight-piece band.
The duo star as George Jones and Tammy Wynette on the 6-part series, premiering Dec. 4.
"Brit’s a great singer," Aldean recently told Audacy's TC and Dina B.
The sought-after singer will drop a 3-song EP at midnight.
