I have to start by saying that I struggled with this. Partly because I don't normally use fabrics, but mainly because I don't have much fabric. Luckily my granddaughter uses fabric in some of her art, so I managed to borrow some scraps (apparently the technical term is off-cuts). She even let me use her machine to sew the background to the base - scary!
There's some fantastic songs on Pam's list, and it was a hard choice, but eventually I went for "El Tango De Roxanne" which is familiar and unknown at the same time. Plus, I'm a sucker for a tango :)