Okay, this wasn't onstage, but it's performing nonetheless, so bear with me.
I'm a voiceover actress, and a couple weeks ago I was doing some work with a friend at a Turkish TV studio - the shows are Turkish, we're providing the English dubbing. Anyway, my character and some friends went out to a bar and were singing a sort of Turkish drinking song - which wasn't translated. So now, not only did I have to sing (and when someone tells you to intentionally sing badly [because the characters were drunk], you just can't sing at ALL, I've found) but I had to sing in Turkish. I don't speak ANY Turkish, so someone had to come in the recording booth and teach me the song phoneticallly. So now my voice has been captured on tape (digital recording... whatever) singing unfamiliar words to an unfamiliar melody, OFF-KEY. I just know that's going to come back to haunt me someday. Hee.
"It's not for sissies, contrary to popular belief." - Tommy Tune, on musical theatre.
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