Adam Levine Doubts Of Marriage Handsome, rich and famous. What else is less than Adam Levine? Surprisingly, Maroon 5 lead singer is even said he did not believe that one day she would marry. What is the reason?. As reported by Digital Spy, he is apparently still confused about whether marriage is the right thing for him or not. However, he admitted to be interested in the tradition of marriage and would like more in depth. “I want to learn about marriage.