I need to choose a song to sing for a chamber choir audition.

So far I was looking at Gaudete as recorded by Steeleye Span but I don't think it's technically challenging enough. I'd prefer something in latin but I enjoy singing in French and even English too.

Any suggestions would be very helpful, thank you.
Haha the first two were the same! Thanks for that. I'm looking for something more technically challenging than those. Gospel won't really suit I don't think, I like the embellishments but they're not looking for that kind of skill, more like precision.