Watch 10-Year-Old Maria Aragon Perform With Lady Gaga Onstage!

Lady Gaga invited 10-year-old YouTube star Maria Aragon on stage with her last night in Toronto to perform "Born This Way" together and it was a big hit!

OK! NEWS: LADY GAGA TO PERFORM TONIGHT WITH 10-YEAR-OLD MARIA ARAGON

"I'm really excited Maria is here today because Maria represents what this song is all about," Lady Gaga told the crowd before the performance. "It's all about the next generation of the future."

"I just wanted to say I'm really grateful for all of you. I just want to thank all of you for all your support," Maria said after the song. "I want to shout out to all my friends back in Winnipeg, and my family, and all you guys — thank you so much."

Gaga looked incredibly proud of her "little monster" while they sang together.

OK! VIDEO: MARIA ARAGON'S COVER OF "BORN THIS WAY" BRINGS LADY GAGA TO TEARS