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He had flown to L.A. because Povenmire and Marsh were hoping Reddick, the lead singer of the pop-punk band Bowling for Soup, would sing the theme song for their new animated series, “Phineas and Ferb.”

Just like how Phineas always knows what he and Ferb are going to do today, Marsh knew what Disney was expecting with the show’s return.

“Phineas and Ferb do something completely out of the box and different every day,” Olson says.

“Phineas and Ferb” co-creators Dan Povenmire, left, and Jeff “Swampy” Marsh in the studio.

Since its premiere in 2007, “Phineas and Ferb” has become the most successful animated series for children and tweens in Disney Television Animation history.