So much fun!

Here's one of Sasha's phrases. I have no idea where she picked it up!
"SO MUCH FUN!"
She says it when she's having fun. It cracks me up. Like she'll be jumping on the bed yelling "SO MUCH FUN! SO MUCH FUN!".

When Sasha plays ball, she kicks the ball around the house and chases it yelling, "I DID IT! I DID IT!". Again, I don't know where she got that. Is she mimicking something she saw, or is she really encouraging herself?