According to something someone saw on a website somewhere, Gwen Stefani's new single is called 'Baby Don't Lie' and is set to 'premiere' on October 6.
The news appears to have been accidentally posted on Interscope's playiga.com, a site that lists current and upcoming radio releases.
It looks like it's all been taken down now, but here are some links from the Popjustice forum that confirm we haven't just completely made it all up.