let's say base is my booty and this is treble because i don't have nothing up here. let's be confident in our skin, which is opposite of what i thought in real life. >> he was thinking "all about that bass" in musical sense and you're thinking about bass in terms of body shape and booty. >> yeah, like my thickness, you know, and that moment we were like how can we make this make sense? i was like bass, no treble but we've made it basically we like the thickness and the body. >> so you had the phrase "all about that bass." did you have a melody? >> we liked duop music and old school. he played that tacky bass sound on a keyboard like dom, dom, f very impressive. i was like by the way, i can rap. he was like what? i said i can rap.