My roomie was singing "Tomorrow" from Annie for her then-one-year-old daughter, and she sang, "the sun will come out..." and Kelly sang, "Two-Mow-Woe!". My roomie was stunned, but each time she sang it, Kelly sang "Two-Mow-Woe!"
Kellly's older now, and HATES to be reminded of it!

So of course, we do all the time!