At long last, it's finally here! The Frozen Fever trailer has debuted -- along with a clip of a brand-new song! -- and it is pure magic.

While we've gone behind the scenes of the new Frozen short and have seen stills from it, this is the first time we're watching Elsa, Anna, Kristoff and Olaf back together in all of their snowy glory. And we get to hear a clip of a brand-new song from the short -- a joyous tune that celebrates Anna's birthday as the characters sing, "Make today a perfect day." "Let It Go" it is not, but we still can't get enough of the happy, celebratory song. Let's be real: Robert Lopez and Kristen Anderson Lopez know how to write a crazy catchy track.

As we previously reported, Frozen Fever will center around all of our fave characters attempting to throw the world's best birthday party for Anna. Of course, Elsa's powers get into the mix, and well, chaos ensues. But the trailer remains mostly upbeat and happy, with laugh-outloud jokes like Olaf sneaking a piece of Anna's cake, eating it, and then putting it back. (Oh, Olaf.) Things only get cray at the end, when Elsa and Anna arrive at the party: Anna looks overjoyed, but, Elsa, well, she looks a little nervous. Yikes!

Remember, Frozen fans, Frozen Fever hits theaters on March 13 -- and you can only see it playing before Disney's live-action Cinderella. So make sure to buy those tickets!

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