Teen idol Justin Bieber made a dream come true for a fan whose father died in 9/11 and proved US President Barack Obama is a man of his word. Obama met 14-year-old Payton Wall at an event at Ground Zero last month and told her he could arrange a meeting with Bieber. The White House contacted Bieber the same day — and last week the singer made good on Obama's promise by meeting Payton in New York. Bieber posed for snaps with Payton, her sister Avery and friend Madison Roberson. The meeting happened shortly after Bieber made an appearance to promote his fragrance Someday at Macy's, sparking a near riot by his devoted fans. Thrilled Payton proudly posted one of her snaps with Bieber on her Facebook page, making it her profile picture. The New Jersey teen told the New York Post: "It was so cool. I couldn't even believe it. He just said 'Hi.' He was asking us about the perfume and if we were wearing it." The three girls lost their fathers — Cantor Fitzgerald executives Glen James Wall and Donny Robertson — in the 9/11 attack on the Twin Towers. Obama had told Payton: "I know Justin. Maybe I could set something up." And sure enough, he did.