Gracie Wickens-Sweet is only 10 years old, but it's easy to forget that after listening to her unbelievable voice. Watch as this darling girl belts Christina Aguilera's hit song "Reflections" on the Britain's Got Talent semi-finals, leaving the judges looking at each other incredulously – her voice is that good. This hit also happens to be the standout track from Disney's Mulan soundtrack and after a flawless performance like this, we wouldn't be surprised if Gracie is providing the voices for future Disney princesses!