EXCLUSIVE: Dove Cameron Spills on the 'Most Emotional' Episode of 'Liv and Maddie' Disney Channel Has Ever Air

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This may be the last song that Liv ever sings!

As the long-running Disney Channel comedy Liv and Maddie comes to a close, (the series finale airs Friday, March 24) Liv is faced with her biggest problem yet -- and only ET has the exclusive behind-the-scenes scoop straight from star Dove Cameron.

"It is the most emotional episode of Liv that she's ever had," Cameron spills in our first look video above.

WATCH: Dove Cameron Lends Her Voice as Spider-Gwen in 'Marvel's Ultimate Spider-Man' Sneak Peek!

"Liv and Maddie: Cali Style" is a three-part story arc that will kick off next Friday, March 3, and will center around Dove's character, Liv, potentially losing her singing voice. The Descendants star explains, "It's something that every singer is terrified of and it's when your voice is under so much use and so much stress that you develop these kind of, like, blisters."

"It's very intense," she continues. "It's basically like a do-or-die kind of moment for Liv and it's definitely one of my favorite moments in the whole series.

Catch the emotional episode, "Sing It Live!!!-A-Rooney," when it airs Friday, March 3 at 5:30 p.m. EST/PST on Disney Channel.

Want more Dove Cameron in your life? Relive her awesome performance in Disney Channel's The Descendants!