Adam Lambert 'had self-esteem issues'

Adam Lambert has revealed that he was not a confident teenager during his school years.

Although the American Idol star is now known for his outrageous performances and flamboyant fashion sense, he admitted that he was afraid to express himself while growing up.

"I never wore full-on eyeliner in high school, but I wanted to," the 27-year-old explained to USA Today. "I wanted to wear nail polish so bad, but I was afraid to. I was afraid to express myself for a while.

"I didn't feel attractive in high school. I had self-esteem issues into my early 20s. I was a little overweight, I had skin problems. As I learned to feel attractive from the inside out, my self-worth got better."