Two Hudson Valley school districts came together to produce an elaborate single-shot lip dub to rally behind a kindergartner diagnosed with leukemia.

The 5-year-old student at Sheafe Road Elementary School in Wappingers Falls is battling a rare form of leukemia. Instead of spending time in the classroom, for the past month Kelsey has been receiving treatments at the children's hospital. Her classmates have been sending artwork, photos and messages of support to help keep her spirits up during the tough road ahead.

Kelsey's father happens to be the principal at another elementary school in the Monroe-Woodbury school district. Over the past month, the entire student body and staff at Smith Clove Elementary have been raising donations and wearing special t-shirts in support of their principal's family. The whole community has come together in a truly unprecedented way.

On March 5 students from Kelsey's class joined the students and faculty from Smith Clove Elementary to produce a massive lip dub video set to songs from the movie "Trolls," Kelsey's favorite film. The elaborate production resulted in a one-shot, unedited tour through the entire school, with hundreds of participants hitting their marks and perfectly timing out each move.

The final product is something you just have to see for yourself.

A special version of the video was shown to Kelsey that also included personalized messages from the stars who voiced the main characters in "Trolls."  According to Kelsey's father, the video put a huge smile on Kelsey's face and gave her a much needed distraction from her treatments.

If you'd like to find out more about how to send your support to Kelsey and her family, please visit the Kelsey's Krusaders Facebook page for details on upcoming fundraisers and events.