<Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (June 2011) (Learn how and when to remove this template message) </Td> </Tr> <P> This is a list of songs from the Disney Channel's original series, Phineas and Ferb . </P> <P> 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 . </P> <P> The first season of Phineas and Ferb was composed of 47 episodes, and 69 songs . It is focused on Phineas and Ferb with their crazed inventions, as Candace attempts to bust them . Also, Perry the Platypus fights his battles against his nemesis, Dr. Heinz Doofenshmirtz . The two songless episodes "Rollercoaster" and "Lights, Candace, Action" are not listed because they do not have songs . </P>

Who sings the intro to phineas and ferb