Seriously. There will be saints in the crowd - several people in the crowd will become canonized saints themselves - it is always like that. One reads stories of saints who were present at the canonizations of other saints. One who pops into mind is Bl. Pierina Morosini who was present at the canonization of Maria Goretti - only to die a martyr of chastity herself.
One other thing to be on the lookout for is people who are present via bi-location. Yeah, that's right. In former ages saints have gone to Rome and elsewhere in that way. I know! They just show up. Padre Pio comes to mind.
I had a mystical encounter in St. Peter's once. I really did.
Things happen in Rome.
Random factoid: Did you know that before Vatican II the only people to reject the canonization of saints were nonbelievers and Protestants. Pretty much.
Look for Larry in Rome.