Maria Aragon -- "Lady Maria," as Gaga dubbed her -- performed 'Born This Way' alongside Lady Gaga herself in Toronto last night.

The 10-year-old Winnipeg YouTube star donned glittery black pants, a monkey scarf, and a fearless attitude as she hopped into Gaga's lap on the piano bench, where she and Mama Monster performed a heart-warming duet of Gaga's hit new single, 'Born This Way.'

"I'm really excited Maria is here today, because Maria represents what this song is all about. It's all about the next generation of the future," Gaga told the screaming Toronto crowd. She watched in tears as she handed the mic off to Maria, who gave a shoutout to her friends and family, and thanked the fans for their support in getting her to the stage. Added Gaga, "If I can touch just one person, it means the world."

Lady Gaga got wind of Aragon a few weeks ago, when she came across the link to her cover of 'Born This Way' on YouTube. “Can’t stop crying watching this. This is why I make music. She is the future,” Gaga said on Twitter. Since then, the Canadian pre-teen has appeared on The Ellen DeGeneres Show and Good Morning America.

Watch Lady Gaga and Maria Aragon Perform 'Born This Way' in Toronto