I haven't seen it in a few hours. It's almost certainly coming from an advertiser breaking the rules and could be gone already, but definitely post here if you see it and if you don't mind, state your geographic location.
I`m getting one in German with "Worldcancerhelp" or something. My firefox alarmed me that 2p2 wanted to open a popup, I was curious(Because I didnt think that 2p2 wouldve popupad) so I allowed it