Harry at the first concert

No ‘g’

Harry at the second concert

Then all of a sudden there is a ‘g’

I’m guessing Nick would have gone backstage?

judging by the picture he posted, he must have been backstage.

And he went to the first concert, didn’t he? I bet you any money, the first concert he would have watched, then he hung out with Harry, between the second concert, and that’s how Harry showed up with the ‘g’

It was drawn on.