Big Sean on Ariana Grande and Kanye

Billboard caught up with rapper Big Sean, who opens up about girlfriend Ariana Grande, his smash single "I Don't F--- With You," which is rumored to be about his ex-fiancee Glee star Naya Rivera, and working with Kanye West.

He discusses the rumors behind his hit song "I Don't F-- With You," sharing that "people are going to think what they want no matter what I say."

"I had that song a year ago, when I was in that relationship, but obviously everyone thinks it's about her," Sean says with a sigh, having been asked this question nonstop since the song's September release. "I write about what I go through -- not fake shit. That's my responsibility."

He also talks about his relationship with girlfriend Ariana Grande, whom he met at KIIS-FM's 2012 Wango Tango concert. She said she was a fan and rapped his lyrics to him.

"She's supercool -- the coolest," he says about Grande ​.​ "Ever since, we've been friendly, hung out once in a while, and it just evolved. I respect her -- so I don't think I should talk about it."