Shirtless Justin Bieber Reveals New Tattoo

First he turned 18, then he got a Fisker Karma as a birthday gift from his manager and Usher, and now teen pop star Justin Bieber is proving his adulthood by getting all inked up. A recent tattoo Bieber got on his arm became a topic for public consumption when talk show host David Letterman tried to jokingly rub it off on The Late Show with David Letterman, not realizing that a fresh tattoo can be easily damaged, not to mention somewhat painful.

^Twitter

Now Bieber has decided to play it safer, merely taking to Twitter while in his room alone to reveal his new tattoo, for which he had to conveniently remove his shirt, as it's located on his upper right pectoral. The pic shows the new design and a grimace on Bieber's face with a caption that reads, "new tattoo is a crown if you couldn't tell."

Furthermore, Bieber, who will be a mentor on the upcoming season of the X Factor, has stripped down for other Twitter pics as of late. "Im thinking to myself, 'wow really justin 3 shirtless pics in 3 days' who do i think i am a young @Mark_Wahlberg sheesh lol," he wrote.

For more on Justin Bieber:

L.A. Reid Announces Justin Bieber As New 'X Factor' Mentor

David Letterman Apologizes To Justin Bieber

VIDEO: Justin Bieber, Miley Cyrus Guest Host Ashton Kutcher's Punk'd

VIDEO: Justin Bieber Gets Fisker Karma For 18th Birthday

WATCH: Justin Bieber, The Wanted Perform On 'The Voice'

Emma Watson, Justin Bieber Have 'Most Influential' Haircuts Of 2011

Justin Bieber Denies Paternity Rumors

VIDEO: Justin Bieber Gets Birthday Kiss From Selena Gomez

Justin Bieber 'Loves Girls'

SPOILER: Justin Bieber To Cameo On 'The Simpsons'

Get Uinterview's FREE iPhone App For Daily News Updates: http://bit.ly/NLMM1k