Justin Bieber — Lighting Up … In Possible Weed Smoking Pics

Exclusive Details 1007_justin_ariana_instgramJustin Bieber may have been photographed smoking at a party again — only this time Biebs got snapped sitting next to a celeb he was reportedly banging.

The photo has been all over social media today … showing Bieber sitting next to a girl that looks a helluva lot like Ariana Grande — and he appears to be holding a long joint.

As you may recall, Bieber was photographed similarly back in January … when he was seen holding what looked like a joint at a Newport Beach party.

Sources close to both singers say the girl in the photo is NOT Ariana Grande — and the pic was photoshopped to look like Bieber was lighting up.

However our crack art department begs to differ — saying the light source seems consistent … and any indicators of a doctored photo are non-existent.

Keep in mind … our art department also made this.