Underground mixtape artist Kendrick Lamar exceeded all expectations as his his debut album, "good kid, m.A.A.d city" is No. 2 on the Billboard charts, behind Taylor Swift’s latest album, "Red."

The 25-year-old rapper from Los Angeles, is not surprised by his immediate success.

"It was really just everybody catching up," Lamar told the Associated Press.

His album, "good kid, m.A.A.d city," sold 241,000 units and was at the top of R&B/Hip-Hop and rap albums charts.

"I'm sure half of the industry probably thought an underground artist or a person with content and substance would probably not see numbers like that." 

One person who believed in Lamar was Dr. Dre, his mentor.

"'This is a classic for your generation and time, and we're going to put this out now,” Lamar recalls Dr. Dre telling him, when Lamar told him he was going to go back to the studio and record more songs for his debut album.

Lamar also spoke to Fuse TV earlier this week in a candid interview, revealing information about his personal life.

When asked about his musical guilty pleasure, the artist replied, “Probably the fact that I listen to more neo-soul than rap. I would say that given the fact that I do a lot of rapping in my music, off the record, I’m really toned down and turnt [sic] down, listening to Erykah Badu and stuff like that.”

Lamar also admitted that his biggest regret is not going to college.

“[My biggest regret is] probably not experiencing college, at least for a semester. That was my biggest regret. Doing it while I was in my teens at least to get the feeling and understanding and try to understand it. Now, all these years have passed, and I’ve gotten into a deep career in music.

"It’s going to be hard to find time unless I put my focus into it.”

Kendrick Lamar also revealed that his biggest celebrity crush growing up was Brandy. “This is a trip,” he said.  “This is funny. When I was 8 years old, I found this four-leaf clover. I picked it up and my wish was to meet Brandy for my birthday. The wish never came true though, so I don’t know about that four-leaf clover stuff.”

Check out the rest of Kendrick Lamar’s interview below: