The singers, who are teaming up for Perry's upcoming Prismatic world tour, cover the latest issue of Billboard magazine. Musgraves tells the mag she's actually seen her pal Perry naked "a couple times"!
"And it won't be the last," Musgraves added. (Oh, to be a fly on the wall of that concert dressing room!)
Meanwhile, the "California Gurls" singer gushed about being a big fan of the 25-year-old breakout country cutie.
"I think [Kacey] straddles the line like I straddle the line of appropriateness and still maintaining a sexuality that is healthy and exciting," Perry says. "And it's not all about that. It's about sending inspiring and empowering messages and being a think-for-yourself type of woman."
"She struck a chord in me," Perry adds. "I feel like we have the same eyes. Not in a physical sense, but in a way of perception."
"We're both very whimsical in our own ways, but I think at heart we're both songwriters," Musgraves says.