who sings the intro to phineas and ferb
List of Phineas and Ferb songs The show's theme song is called "Today is Gonna Be a Great Day" performed by Bowling For Soup. There is a Christmas version for "Phineas and Ferb Christmas Vacation", a Halloween version for "That's the Spirit" and "The Curse of Candace", a winter version for "For Your Ice Only" and "Happy New Year!" and another Halloween version for "Druselsteinoween", "Terrifying Tri-State Trilogy of Terror", and "Face Your Fear". An adaptation was also made for the 2011 Little League World Series.