Movie Star Jack Black proves he's larger than life as he breaks out the guitar for an impromptu jam session and shows the boys how to juggle everything from live poultry to the kitchen sink!
Actor/comedian Andy Samberg shares some family secrets, shows off his soccer skills and unveils a whole new rap style with Phineas and Ferb!
Get to know the real Seth Rogen as Phineas and Ferb talk to him about Santa Claus, super powers, and his best day ever.
Phineas and Ferb spend time with legendary skateboarder Tony Hawk who gives the boys new nicknames, talks about skating in space, and shows them some awesome tricks!
Phineas and Ferb rock out with pop sensation Taylor Swift as she shows the boys some of her trademark stage moves and poses for photos with a starstruck Candace!
Who knew Regis loves hip hop and "Squirrels in my Pants"?
Phineas and Ferb welcome star of stage and screen, Neil Patrick Harris, who goes toe to toe with Dr. D in an evil laugh-off, and then dazzles the boys with some eye-popping magic.
Randy tells the boys about what dogs they would be and gives Candace some useful singing tips!
Emma Roberts sat down to chat about believing in mermaids, showed off her best scream scream and even dished out some advice to Isabella on guys!
Cedric comes by and Phineas questions him on his first comedy act and Cedric shows off his dance moves with the boys.