Unique words in songs

[giraffe]

Yes I went to sleep humming bohemian rhapsody last night following that post. There's quite a lot of weird words in that one.

[Wulfruna]

a duplex, and checks. Sign your 'X' on the line

Yes, that's one of my all-time favourite lines as well - from an all-time favourite song.....

[MBH]

I had a feeling about the rhyming thing - obviously a "puzzler's" trait. So many to choose from (some had me howling with laughter), but here's an old style version:

http://www.youtube.com/watch?v=xOMmSbxB_Sg

I'm gussing it's Madonna who is responsible for turning the "54 converteble" into an "outer-space converteble" ??? An example perhaps of a song lyric passing it's "use by" date?