Thanks to Gem from the TIF we have an audio of Siobhan's solo Can't Smile Without You. Although not the best quality, it still gives an idea of what she sounded like for those who weren't able to see the show. I haven't heard her voice for a year so this was just amazing to listen to.
Here's the Youtube link:
There are other audios of Siobhan on Gem's youtube account if you want to take a look!
Thanks again Gem!!