Check Out Video of Lady Gaga Performing with a 10-Year-Old YouTube Sensation [VIDEO]

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LADY GAGA made good on the promise she made to 10-year-old Maria Aragon, who became a YouTube sensation after uploading her cover of "Born This Way".

 --Last month, she told Maria that she'd bring her up onstage to do a duet when she came to Toronto.  (--Maria lives in Winnipeg.  That's over 1,000 miles away from Toronto, but hey it's Canada.  Close enough.)

 --The concert went down last Thursday night, and sure enough Lady Gaga brought Maria up for a "Born This Way" duet.