What age difference??
Despite the more-than-20 year age difference!
Here's what Selena wrote to go along with the pic:
Selena's mom Mandy and step-dad Brian Teefey are SO lucky! They have the best babysitter available for Gracie… free of charge!
We cannot wait to watch these two grow up together! Best big sister ever??
P.S. CLICK HERE to "follow" Perez on Twitter!
P.P.S. CLICK HERE to "like" Perez on Facebook!
[Image via Instagram.]