the two of you come up with a song. is it -- >> yeah. >> we'll get to the song in a minute but i want to talk process first. is it true it took you 45 minutes to write "all about that bass". >> it was a quick write, yeah. it's like chemistry. have you ever created something with a stranger so fast? i guess that's not a relatable thing. song writing sessions is like you meet like a blind date. kevin was this man who had a wife and a kid and i was a 19-year-old kid just trying to write songs so i was like nice to meet you. thanks for letting me come to your home and writing a tune with you. and we talked about where we're from and that i was a chubby kid growing up and we -- he said i have a title all bass no treble. i said you know what the kids say? i'm all about that. let's make it all about that bass in trebl treble.