... if you're having trouble figuring out which Muppet songs to add to your almost-entirely-Muppet-song-filled iPod next.
... if the only reason that you found out that Judy Garland sang a version of "After You've Gone", or the fact that the song has actual lyrics, is that you absolutely adore when the Muppet Orchestra performed that song in the UK Spot of TMS Episode 504: Shirley Bassey, a.k.a. the first episode that Lips actually had significant screentime and performed "Barnyard Boogie" with the rest of the EM, in which he got to sing a verse by himself.
In fact, you KNOW you're obsessed if you know that the above is true.