We already know that Disney and Pixar can be sneaky and often surprise us, connecting characters from different cartoons in a way that only a sharp eye and great memory (plus lots of rewatching) can notice it. You must remember Andy's mom from "Toy Story" but did you realize who she really was? Take a look at these pictures and find out.
Who she can be? You don't see her face in parts 1 and 2, but here she is in Toy Story 3.
Her Name Is Never Revealed
She's known as simply Ms. Davis.
But, You Surely Remember This Famous Hat Andy Wears All the Time
The hat is very important for the theory. It would be expected that Andy would rather wear a hat similar to Woody's, as he's his favorite toy, but he wears a hat that is similar to another toy. You've seen it already somewhere, but can you remember where?
Jessie Is the One with a Surprisingly Similar Hat!
The only difference is that Andy's hat lacks the white ribbon that is notable around Jessie's hat. But otherwise, they are completely identical.