User Tsuko posted this around early 2012 --
"Yeah, I think Somebody That I Used to Know will replace fun. at #1, but it'll probably take like 4 weeks with the promo and then making up the airplay gap. Then Gotye should also have like 2 months at #1 after that. The song has been one of the biggest songs ever in most countries, so the US should be no exception."
The whole statement came true -- Gotye replaced fun and stayed there for 8 weeks
