For a gig at the (Australian) National Folk Festival, I though it would be neat if I sang Shirele Perele while my daughter sang Eliahu Hanavi, as both songs are about the coming of the Messiah, one song in Yiddish, the other in Hebrew. My daughter, who actually knows something about music, pointed out that one song was in 4/4, the other in 3/4, so it wouldn't work. I wasn't going to let a little thing like that stop me, so we just sang both songs in 4/4, and she fiddled a few of the notes in Eliahu to avoid the more egregious dissonances ("we had to destroy that song in order to sing it").