Why do I hear Dora music at 6am?

I woke up hearing "Dora, Dora, Dora, The Explorer!!".... Looking around, pitch black, confused as all heck. Then I realized my DD fell asleep with her Dora shirt on that plays music if you squeeze the bottom.

Oh my. [I'm sure I get a Bad Mommy Award for letting her sleep in her shirt because I was *not* waking the crabby princess.]