With Frozen, it seems Disney can't just, ahem, let it go.
In addition to your favorite Frozen characters on Once Upon a Time this fall, you'll be able to see them in an animated short set to premiere in spring 2015. Disney announced the new short during Tuesday's special The Story of Frozen: Making an Animated Classic on ABC.
The short, Frozen Fever, will follow Anna, Elsa, Kristoff and Olaf as they celebrate Anna's birthday, although apparently Elsa's icy powers will make that tricky (we hate when that happens).
Directors Jennifer Lee and Chris Buck will return to the direct the short, and — much more importantly — the Oscar-winning husband-and-wife duo Robert Lopez and Kristen Anderson-Lopez will return to write a brand new original song. Get ready for it to be stuck in your head all the time always.