When your ringtone is Donna McKechnie belting "Plaaaaaay me the muuuuussiiiiiIIIIIIIC!"
Or, when you can name every actress to play Cassie...in order.
Or, you found a musical theatre database, spend most of your extra money buying playbills and inputing their information into it.
Yes, I have done all three.
http://www.youtube.com/huskcharmer