The season 13 semifinals of 'The Masked Singer' features twists galore, from the head-to-head format to Lucky Duck unmasking himself and throwing in a finale shocker.

The case of Detective Lucky Duck was finally quacked on Wednesday’s episode of Fox’s “The Masked Singer.” Taika Waititi was the latest celebrity to be revealed on Season 13 of Fox’s “The Masked Singer,” playing the mysterious character that had popped up all season long on the show to share clues about the competition’s costumed contestants.