O.M.G. That better not be real, girl! Selena Gomez performed in Las Vegas over the weekend, and she stepped out onstage sporting some ink on her wrist in honor of her boyfriend Justin Bieber. The "tattoo" in question reads "Justin" in black, script font with a heart beneath it.

Even though Selena looked stunning in her dramatic, gold performance dress, it's hard to take your eyes off of the affectionate branding on her wrist. We strongly doubt it's permanent -- the text and heart look like they could be inked on with a black marker -- but if it is, this is a serious statement for The Biebs and Ms. Gomez.

The couple is getting hot and heavy lately, as they have been spotted kissing and partaking in some serious PDA by celebrity photographers. Also, Bieber spoke to Women's Wear Daily recently about how he wants to get married by the time he is 25, prompting some rumors to start up about whether or not he could propose to Gomez if their romance lives on through the coming years.

We hope that Ms. Gomez remembered that relationships come and go, but tattoos are forever -- aka that her "Justin" body adornment is not real! While this would mark Gomez's first tat if it was in fact the real deal, Bieber has got a few pieces of actual ink. The singer recently got a religious tattoo along with his dad, and also has a star inked on his elbow and a small outline of a flying bird on his hip.