Umbrella. If anyone here remembers both peaks, you'd know Umbrella was MASSIVE in the summer of '07 and on top of that, why do you think so many artists still incorporate "ella" or "eh eh" into their songs to this day? Wasn't really a thing before Umbrella
You can always tell when people were too young to experience a songs impact/era when their only defense is stating sales figures. It's easy to tell if you consciously remember the actual peaks of a song/era.