Yo Quiero Sugar Skull

The class is observing a collage. One student asks what the skull image in it means.

Me: That's a sugar skull
Ditzy Blonde: YEAH! Those are part of Dia de los Muertos...it's to celebrate family that has passed on. It's a really important holiday in Mexico.
The whole class: *Dumbfounded stare*
Me: Wow, good job. How did you know that.
Ditzy Blonde: Uhhhh, it's on Beverly Hills Chihuahua. I've seen it like, a million times.