Nickelodeon's megahit show SpongeBob SquarePants made its TV debut on May 1, 1999. Fans of the cartoon span generations and the animated series has become a multibillion-dollar franchise.

Nickelodeon's megahit show SpongeBob SquarePants made its TV debut on May 1, 1999. Fans of the cartoon span generations and the animated series has become a multibillion-dollar franchise.

Finish this tune: Who lives in a pineapple under the sea? If you answered correctly with "SpongeBob SquarePants!" you've likely heard of the square, sponge cartoon who made his TV debut 25 years ago ...