Halle has been bewitched.
It seems that a run-of-the-mill criminal broke into Grandma's house and quickly turned the TV station to Barney and Friends when Grandma wasn't looking. The perpetrator vanished before he or she could be caught, but the damage was done. In no time, Halle was dancing under its spell like a Desperate Housewife of Salem, Massachusetts, circa 1692.
Barney & Friends is to adults as chocolate is to dogs.
I guess I'll have to counterbalance that with an ironic Berenstein Bears book about the disruptive nature of commercials and I would assume, corporate licensure of characters. Sigh.