Is Kate Moss back on drugs?

Kate Moss, who recently solidified her relationship with Pete Doherty, attended a Babyshambles concert and was spotted with a white substance in her nose. Although my first thought is Kate Moss is back using cocaine, I thought of other possiblities. Not only could it be cocaine, it could be pixie stix, hardened semen, and/or tissue left over from blowing her nose. However, among all the different possibilities, everyone is going to lean towards, “She’s a damn drug addict” again, but I still think this was photoshopped.
Discussion Question: What do you think the substance is? Comment below!