Justin Bieber on November 4, 2012 in Philadelphia. Credit: Gilbert Carrasquillo/Getty Images

New year, new ink!

Adding to his eight existing tattoos, Justin Bieber debuted his newest artwork via Twitter Dec. 31: roses on his left leg, situated next to a massive set of praying hands.

"New tat," the 18-year-old "Boyfriend" singer posted on Instagram. Also over the long New Year's Eve holiday weekend, Bieber posted shirtless pictures taken in an undisclosed location. "Vacay," Bieber wrote in one image, which shows off his crown tattoo on his chest and the word "Believe" on his left forearm.

Many of the singer's tattoos have religious significance, including one on his ribcage that reads "Yeshua," which means "Jesus" in Hebrew. He also inked a portrait of Jesus wearing a crown of thorns on his leg.

Bieber wasn't the only celeb to unveil new ink over the holiday weekend. Ahead of her gig hosting MTV's New Year's Eve bash live from Times Square, new mom Snooki tweeted about her "fierce leopard tattoo."

"I wanted to get this because to me it represents being a strong independent woman, and obviously I love leopards/leopard print! The crown represents being a queen and being fabulous, and the wings represent everyone who has passed in my family," Snooki -- who got inked when she shot the Jersey Shore reunion -- wrote on her Celebuzz blog. "Anytime I can incorporate my loved ones who have passed, I do it!"