When the aliens return in their UFO, an excited Kevin thinks he's finally getting superhero powers like Gretel and Hamster, but it turns out all he's getting from the aliens is a Theme Song Takeover.

Check out your first look at Baby City Greens the new spin off of the hit Disney Television Animation series Big City Greens...April Fools.

The fans demanded it, and it's finally time for Libby's "Theme Song Takeover." But can Molly get Libby on board?

When Remy requests that Vasquez take over the "Big City Greens" theme, everyone's favorite bodyguard uses the power of hard rock to sing about what his very untypical day is like.

Molly's trouble-making brother Darryl asks if he can borrow her theme song to pitch some of his unique 'business opportunities' (aka total scams!)

As the world's most advanced supercomputer, it's Beta's duty to take over Hailey's theme song in this Theme Song Takeover.

When Penny finds herself "all tied up," LaCienega graciously volunteers to take over the "Proud Family" theme song to show the world what a star she is.

Helen, Barry, Candle and Principal Secretary all demand that Kiff shares her theme song. Soon they all take turns giving the Kiff theme their own unique spin.

When Moon Girl finds herself overbooked, she puts her theme song in Devil D's safe tiny hands for a roaring good time.

With another season of Phineas and Ferb on the way, Dr. Doofenshmirtz decides to take over the theme song to make the show revolve around him! Can Perry the Platypus stop him?

When Kiff gets covered in Helen's magic "Theme Song Takeover" potion, she finds herself transported across Disney Channel's theme songs from Phineas and Ferb (2007) to Kim Possible (2002).

When Scott is given a chance to sing his version of the "Hailey's On It" theme, he uses the chance to share the things he wants to do on his - let's just say - very UNIQUE list.