The Beetlejuice Game: Complete the Phrase

Howard gave a caller the chance to play The Beetlejuice Complete the Phrase Game and potentially win a cash prize. Here're the phrases the Wack Packer had to finish:

"Twinkle twinkle little..." The caller incorrectly guessed that Beet would get it right: "Oh twinkle little f'ing birdie?"

"Jack and ___ went up the hill" The caller bet against Beet for his first point: "Oh Jack up in the f'ing hills?"

"I pledge allegiance to the ___" The caller took the prize when Beet nailed it: "To a flag?"