A California high school made history on Friday when it elected its first transgender homecoming queen in the school's history.

Cassidy Lynn Campbell, 16, is now the reigning homecoming queen at Marina High School in Huntington Beach. At her crowning ceremony, she instantly fell to the ground and started crying tears of joy.

But what the 16-year-old thought would be 'the happiest night of my life' ended with her recording a tearful Youtube video describing how the negative feedback hurt her more than it ever had before.

Campbell says she decided to run for homecoming queen earlier this year to make a statement.

While most of the kids at the school accept Campbell as female and were excited to see her win, it appears some weren't - which prompted the heartbreaking YouTube video. See below.

The crowning moment