Forest - Part 2 A Friend in Need

As Thomas and Pricilla practice their dance routine for the upcoming Village Talent Competition in the forest while the four large singing oak trees sing for them, they bump into Becky and Cap running around the forest playing soldiers. As the two parties get to know one another and become great friends Thomas is confronted with a big problem with only two weeks left to go till the talent competition.
You see, Pricilla is Thomas' imaginary friend and Cap, like Pricilla, is Becky's imaginary friend too.
Only children with imaginary friends can see other children's imaginary friends and of course the oak trees and animal too.
How will Thomas be able to compete in the competition with Pricilla when no one will be able to see her?
What will he do, and will Becky and Cap be able to help?