sweet sixteens, proms, cheerleading, child beauty peagents, halloween costume parties, the obsession with US television shows and films...etc. etc. etc.
hip hop, rock & roll, house & techno..on and on and on
for a place that thinks of itself as superior to americans they sure pick up on a lot of americanisms. it all just confirms what the rest of the world has always suspected - brits really want to be americans......just don't tell them that though; they're a little sensitive on the subject.