Justin Bieber almost quit music.

The "Boyfriend" singer - who releases his second album Believe next month - admits he almost gave up on his singing career as he couldn't cope with the pressure.

"There were so many times when I just wanted to say, 'Enough is enough, I don't want to do this any more,'" he said.

The 18-year-old heartthrob says it was only the love that he felt from his millions of fans that he decided to carry on. Speaking about the lyrics, "You kept my heart from falling," in one of his new songs, Justin told The Hollywood Reporter, "I think it's so important to me because it's about my fans and how much they've helped me. They really have kept my heart from falling because they've always been there and supported me and cheered me on."

Believe is set to be released on June 18.