In a major 2004 upset, the puppet-centric musical "Avenue Q" defeated which heavily favored "Oz" prequel to win the Tony Award for Best Musical?

Wicked

While 'Wicked' became one of the highest-grossing musicals of all time, 'Avenue Q' won the 'Triple Crown' of Tonys: Best Musical, Best Score, and Best Book. 'Avenue Q' is known for its adult themes and Sesame Street-style parody.