According to reports, US Duffy fans think she is the love child of Tom Jones because of her powerful voice. Well, they are both Welsh, I suppose, and there are only about five people living in Wales, so you can see how that rumour came about. Anyway, she's somewhat unsurprisingly denied it. "I'm dealing with this every day here [in the US]", she says. "It's kind of bizarre. You've got to laugh".
Duffy's actual father apparently runs a bar in North Wales. So now you know.