Who said "This is the best day of my life! And I have no idea why."?

This quote is attributed to Ralph Wiggum.

This is the best day of my life! And I have no idea why. - Ralph Wiggum

"This is the best day of my life! And I have no idea why."

Ralph Wiggum Happiness

"I'm in danger."

"Me fail English? That's unpossible."

"Eat my shorts."

"Ay caramba!"

"Babalú!"

"My greatest joy is making people smile."

"Laughter and love make a home."

"The best things in life are free."