In this video, Drake(while continuing to rock that oversize
bathrobe) talks to Billboard about the popular singer's
collaborative efforts on Take Care. In his words:

"Not only did he inspire me to get out there and sing better on stage, he inspired me writing wise, music wise, just to better my product. He’s on my album a lot. We really collaborated a lot on this album. He’s one of the greatest artists I’ve ever heard. To hear someone with an incredible body of work is very rare. It’s very inspiring. We formed OVOXO, which is taking over right now. I’m proud of him. He works real hard. He’s just an incredible person, [has] become a really close friend to me."