What's a BBL?
K1, J7: Contestants must remember things they learned in grade school, like how many keys are on a standard piano, to win 100,000 dollars; helping them along the way is a classroom full of celebrities.

K1, J7: Contestants must remember things they learned in grade school, like how many keys are on a standard piano, to win 100,000 dollars; helping them along the way is a classroom full of celebrities.