Is cheer leading an inate quality?

For about the last 2 weeks Reagan will say, "Ready, Okay" and jump, over and over again. She sounds just like a cheer leader and I cannot figure out where in the world she could have come up with it, as I'm pretty sure she's never watched a t.v. show with cheer leaders in it. Could cheer leading be a quality that they are born with? Scary thought!