"I've never heard a Jay-Z song," the singer, 16, said in an interview before her Halloween concert -- in which she was dressed as Pocahontas -- in Louisville, Kentucky this past Saturday. "I don't listen to pop music."

Then how did it get in her song -- which was recently No. 1 on the Top 40 charts?

"I don't know, I didn't write the song, so I have no idea," she said of the tune, which was written by a songwriting team of Dr. Luke, Claude Kelly and Jessica Cornish. "Honestly, I picked that song because I needed something to go with my clothing line.

Found during my daily dose of trashy entertainment reading ... This soundbite speaks volumes about the Cyrus brand.