Katy Perry and Dolly Parton dazzle at ACMs

Katy Perry and Dolly Parton brought all the dazzle to their performance during the Academy of Country Music Awards in Las Vegas, Nevada on Sunday night.

The divatastic duo belted out a medley of Parton's hits, including "Coat of Many Colors" -- about a coat her mother made her when she was a small girl -- her much-loved and often-covered hit "Jolene," and the '80s working girl's soundtrack, "9 to 5." The 70-year-old singer appeared on stage in another coat of many colors -- and many thousands of sequins! Not to be upstaged, Perry channeled pop-couture cowgirls in a red Jeremy Scott outfit and pink cowboy boots.

WATCH: Dolly Parton Gushes Over Katy Perry ACM Awards Duet - 'This Might Strike Up a Whole New Thing!'