Justin Bieber X Tattoo: Singer Debuts New Ink In London (VIDEO)

Justin Bieber added some new art to the expanding canvas that is his 18-year-old body.

On Monday night, the recently single singer unveiled his newest tattoo when photographers snapped photos of him leaving Cirque du Soir nightclub in London. Photos show that Bieber has inked a large "X" on his left arm, and while X marks the spot, this particular X is believed to be the Greek letter "Chi," which means Christ, according to the Daily Mail.

The religious symbol goes well with the other tattoos Bieber has amassed in the last couple of years. In addition to his most recent body art, Bieber also has the Roman numerals "I, IX, VII and V" inked just beneath his right collar bone; the logo for his hometown's junior league hockey team, the Stratford Cullitons, on his shoulder; a large visage of Jesus that sits above the roses on his calf; and an owl tattooed on his left arm, which is right next to his "Believe" ink.

At the rate he's going the Biebs could potentially run out of room for new ink in a few years' time, as he also has the Japanese Kanji symbol for music on his right arm, a bird on his hip, a crown on his chest and the Hebrew word for Jesus on his rib cage.