Good article which makes clear that Simon has not become a US citizen. And when he does, it will be dual citizenship.
Excerpt:
"It was ridiculous. It came out of an interview in New York, right after Barack Obama was elected President, and I was asked how I felt. I said we had said we should become citizens.
"Suddenly my mum's calling me, saying, `I was at the doctor's and New Idea is saying you don't want to be Australian any more' and every interview I've done since has said, `So what, you don't want to be Australian any more?'
"I'm an incredibly proud Australian, ridiculous to the point where my American friends get sick of hearing me say, `But in Australia it wouldn't happen like that'. I'm that guy. So it broke my heart when people were saying, `Ah, you don't want to be Australian'. "I was like, you don't understand. "There's no rejection of my Australian-ness. That's something you'd have to beat out of me with a stick."