How We Made Overload: The Guardian interviews Siobhan and Mutya about the recording of the song:
"We recorded our vocals on a handheld mic, just a quick demo, one take. The idea was that you’d come back and do it properly later. At least, that’s what Cameron told us, which meant we were completely relaxed. My vocal on Overload is quite pitchy – but that was exactly what he wanted to capture, the raw emotion in the moment."