Justin Bieber 'Grows Up' [PHOTO]: Selena Gomez's Ex-Boyfriend Posts Pic of Fan's Bra on Stage During Concert to Instagram

Justin Bieber captioned one of his latest Instagram photos with the statement: "I guess everyone grows up." The picture in question was of a lone bra, apparently thrown on stage by one of the many Beliebers in attendance during one of his "Believe" tour concerts this weekend. The 19-year-old "Boyfriend" singer has tried to prove his maturity and professionalism time and time again over these last few months, but has somehow come up a little short. Usually, his "bad-boy" antics take up the headlines rather than his mature actions, so this Instagram picture is making us all wonder if he is really grown up just like he claims his fans have.

Here is the photo from Bieber's Instagram account:

Though the statement on this recent Instagram photo is mostly a joke, Justin has previously spoken out in public in support of his maturity.

Back in March, The Biebs took a stand against his negative image during an interview with Us Weekly.

"The biggest misconception about me is that I'm a bad person," he said. "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."

Another, more recent occurrence of the "Baby" singer's desire to be taken seriously and as a maturing young man came during this year's Billboard Music Awards when he was accepting his Milestone Artist award. When some people in the audience began to boo the young pop star, he turned his acceptance speech into a statement against his critics:

"I'm 19 years old. I think I'm doing a pretty good job. 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."

Clearly Justin is passionate about how he is perceived in the media so do you think his latest Instagram post was childish or mature?