Justin Bieber posted on Instagram a photo of a lone bra resting on a concert stage over the weekend, writing, "I guess everyone grows up."

It is not clear when or where the 19-year-old received the lingerie, but the photo garnered much attention after it was uploaded on Sunday. Some of the comments included, "haha," "lol" and "Ew."

The #thatPOWER singer is on a break from his Believe Tour until June 22 and is having as much fun as he can before hitting the road again. He went partying last week at Mansion for the nightclub's Hot Excess Monday's hip-hop party.

"Bieber was surrounded by an ever-growing group of girls, talking to one unknown girl in particular, but also spent time texting and enjoying the music on stage," a source told People magazine. "He stayed until the lights came on at 5 a.m., closing Mansion down." 

Early Sunday morning, June 9, he hung out with Miley Cyrus at Beacher's Madhouse at the Roosevelt Hotel in L.A. The two reportedly got flirty, but Cyrus confirmed in a later radio interview that they are just friends. 

Bieber tried to enter the Toxic Luau Beach Day party, held at the Lure night club in Hollywood, on June 8. However, security would not allow it and he was turned away at the door because he is underage.

"Someone from Justin's team had come earlier in the day and told the club that he would be showing up. The club told him they wouldn't let him in because he's not 21. Bieber came anyways and tried to sneak in through a back door," a source told E! News.

Bieber got inside but after The Game gave him a shout-out on stage, security personnel realized he was inside the venue and escorted him out. He left right away and "he seemed really embarrassed," the source added.

Tags: Justin Bieber