2230Picture%201.jpgMelanie Amaro of Sunrise Florida was crowned the very first winner of X Factor US, beating out 30-year-old singer Josh Krajcik of Wooster, Ohio.

The 19-year-old couldn't hold back tears as her name was announced -- she also landed a $5 million recording contract and a starring role in a Pepsi commercial!

Amaro was too choked up to give a thank you speech after her win, so Simon Cowell spoke for her, saying: "I want to say, America, thank you for giving this girl an opportunity."

The new winner then struggled through tears to cover Beyonce's hit, "Listen," and thanked fans for their support, gushing: "Thank you so much! OMG, I don't know what even to say... God is good... Thank you America!"

But while Amaro cried tears of joy on stage, there was some major drama behind the scenes! Two crew members sustained head injuries, and another was hit in the elbow, as a stair riser came unhinged just before rapper 50 Cent took the stage.

Paramedics rushed to the scene within minutes, and all three were taken to Cedars-Sinai Medical Center to receive treatment for their injuries.

Upon leaving the studio for the hospital, one of the injured crew members expressed: "I'm fine! ... on the f--king last night of the show!"

Congrats to new X Factor winner Melanie Amaro!