What does kattiy perry mean buy saying Daisy Dukes biknes on top mean?

The phrase "Daisy Dukes, bikinis on top" is a reference to the popular country music song "Boot Scootin' Boogie" by Brooks & Dunn. In the song, the narrator sings about going to a honky-tonk and seeing all the women wearing Daisy Dukes and bikinis. In general, the phrase is used to describe a particular style of women's clothing that is popular in country music culture.