Same here. I just would have assumed he was another random male model, or at most a soap opera star or something. I certainly wouldn't expect to find a stupidly talented popstar behind that ad.
But who knows, maybe people who recognize his name but had forgotten about him since Grace Kelly may see this ad and go "wait, that's Mika? That dorky kid with the fluffy hair and the weird red outfit in that song about being like Grace Kelly? He got HOT! :shocked:"
I think it all comes down to learning to speak Mika-ese.
For example, over the past four years I have learned that in Mika-ese, "acoustic gig" means "with loads of drums and amplification, just without backing tracks." And apparently "hiding away working on my third album" means "working on my third album... in between parties, premieres, and making some side cash with corporate gigs and big name ad campaigns."