I just noticed that Asuna Kagurazaka from the Negima English dub and Akane Serizawa from the Pani Poni Dash English dub have exactly the same voice. They're both voiced by Luci Christian. I'm not sure where to mention this on the page though.

Does a page like this exist for singers? I can think of a couple of singers who feature all over the place on other peoples' work.