I went a little nuts: Adam Levine on his rockstar lifestyle

Maroon 5 frontman Adam Levine admits that early fame got into his head.

The 35-year-old singer, who is set to marry supermodel Behati Prinsloo, says he is not an easy guy for people to like but he has evolved over the years, reported People magazine quoting his GQ interview.

"Would it be really easy to assume that I was a douchebag? Definitely. One hundred percent. I'm not an easy guy to root for," he says in the interview.

The 'Voice' coach, 35, poked fun at his rock star image which include his multiple relationships."Men are not as sophisticated as women. They're not as mature as women. They're not as connected with their emotions as women. There's a very Neanderthal quality that still exists in a lot of men," the Begin Again star said.

"There was a time in my life when I lived probably a bit more on the primal level. And it was amazing. All of a sudden I had money in my bank account. I hadn't had a break in a long time. And I went a little... nuts. I deserved to go a little bit nuts. And I had the time of my life."

Levine, however, now want people to believe that he is a changed guy.

"People change, people grow up, get more self-aware... If I knew everyone in the world, they would love me. Every one of them. I'm not arrogant. I'm cocky. It's different. Cocky is playful."