Um... Didn't do what? Use very very very popular music in their songs? It's like to use... "Jingle bells" , I really REALLY don't understand for what reason people is "pleasantly surprised"
But reading comments about "ooo aaa captivating violin" I understand BP opened whole new world for their fans with this one
I don't believe you're actually that dumb, you're just acting dense on purpose but they haven't sampled a classical song before.