Payton and Avery Wall met their idol on Thursday when they chatted with Justin Bieber in a VIP section of Macy's in New York.
The girls' father died on 9/11, and when President Obama visited Ground Zero to mark the killing of Osama bin Laden, Payton asked him if he could pull some strings so she and her sister could meet the Biebs.
The President delivered, and helped make the Wall's dreams come true.
"It was so cool. I couldn't even believe it," Payton told The New York Post.
Wall tweeted on Thursday, "Obama kept his promise, off to see @justinbieber!"
HuffPost Entertainment is your one-stop shop for celebrity news, hilarious late-night bits, industry and awards coverage and more — sent right to your inbox six days a week. Learn more