Justin Bieber posted a picture of a bra that one of his fans threw at a recent concert. Credit: Carlos Alvarez/Redferns via Getty Images

Long are the days of Beliebers throwing stuffed bears and Bedazzled posters to their idol, Justin Bieber. As the singer proves in a new Twitter picture taken during a recent Believe tour stop -- he and his fans have, well, matured.

On his Instagram page, the 19-year-old shared a pic of a lone beige-colored bra sitting onstage while thousands of girls scream in the background. His caption for the lingerie photo? "I guess everyone grows up."

Indeed, the Canadian-born singer has done a lot of growing up since he burst into the scene in 2009. In the past few months, the singer has gotten quite a lot of flak for some of his poor decisions (among them, having a less than stellar driving record), but he hopes the haters leave their opinions to themselves.

Accepting the Milestone Award during the Billboard Music Awards in May, the "Beauty and the Beat" singer defended himself while some of the crowd booed.

"I'm 19 years old. I think I'm doing a pretty good job," he argued, "Basically from my heart I really just want to say it really should be about the music. It should be about the craft that I'm making. This is not a gimmick, and I'm an artist, and I should be taken seriously."

In March, Bieber, who's getting ready to premiere his new single "Heartbreaker," told Us Weekly exclusively that he still takes his role model status seriously.

"The biggest misconception about me is that I'm a bad person," he told Us. "I get upset about that. I have a big heart. I want to be a good role model, but some people want me to fail."