Here’s a unique rewrite of your text:

At just 14 years old, this teenager already has a big dream. That’s why he decided to audition for the talent show—to turn that dream into reality.

When Jack revealed he’d be performing a Whitney Houston song, the judges were immediately doubtful. After all, Houston was known for her incredibly powerful voice, making her songs notoriously challenging to cover.

However, Jack stunned everyone. His performance was so impressive that it deeply touched the judges, and one of them was so moved, they even rushed on stage to give him a kiss.