on it and he'll run over and go, do this and do this. it's crazy watching them work. >> they had basically four weeks. the thought pattern was we'll make it for the summer, put it up for the summer, and in to days, they made 20 songs. >> 20 songs released in two parts, and feature a notable collaboration between justin and jay-z. ♪ no papers >> obviously there was a chemistry that happened to make suit and tie" and it became the leadoff record. >> show you how to do this. ♪ as long as i got my suit and tie ♪ ♪ i'm going to leave it on the floor tonight ♪ >> by working with jay-z, he's getting an artist as well formed as he is, and in a way, it is a grown-up approach to singing and rapping together on the same song. ♪ >> he makes what folks around my way called grown folks music. >> exactly.