WATCH: Sebastien De La Cruz Sings Again at NBA Finals Game

“People don't know, they just assume that I'm just Mexican, but I'm not from Mexico,” De La Cruz said. “I'm from San Antonio, born and raised.”

Many also took to social media to express support for the young singer, such as professional boxer Victor Cruz, who is also Mexican American. He tweeted the following yesterday: “To the little guy #SebastianDeLaCruz you have nothing to be ashamed of I too am American/Mexican ITS A FREE CNTRY! USA is made of all RACES!”

Eva Longoria also expressed her support to De La Cruz, tweeting “So proud of @selcharrodeoro Sebastien De La Cruz!”

Watch De La Cruz do his thing onstage again – take that, haters: