Lady Gaga got very emotional last night in Toronto while singing her new hit single "Born This Way" with 10-year-old YouTube sensation, Maria Aragon.

Gaga made good on her promise to invite the precocious girl up on stage, and put Aragon on her lap for the moving duet in which they both sang and played the piano.

Gaga teared up during the stripped-down version, which left many fans just as weepy. After the song was over, Gaga hugged little Aragon as the crowd burst into applause.