Send pizza.

That message went a long way, after the mother of a little girl battling cancer posted it on her daughter's hospital room window in Califronia.

After posting the note to the window, dozens of pizzas came.

Someone even took a picture of the sign and posted it online.

It went viral.

The hospital eventually had to ask people to stop sending pizzas because so many were coming in.

Hazel's mom threw a pizza party for all the kids at the hospital.