Drew Barrymore

With 28 Emmys and a slew of other prestigious awards, Disney's resident way-cool scientist knows how to get kids fired up about science. From Earth science to complex discussions on genetics, Bill Nye's enthusiasm for all things science is contagious.

Pop icon Mariah Carey ushers in the holidays with a festive extravaganza featuring classic hits, seasonal staples and a lineup of very special guests.