
By Julie Shapiro
DNAinfo Reporter/Producer
LOWER MANHATTAN — Justin Bieber pledged Thursday to make a 9/11 teen's dream come true.
Fourteen-year-old Payton Wall, whose father was killed on 9/11, told President Barack Obama at Ground Zero last week that she wants more than anything to meet the Canadian pop star.
As DNAinfo first reported, Obama told her he knew Bieber and would make it happen — but until today, Bieber had been silent on Wall's wish.
That changed when Bieber saw a New York Magazine blog post questioning Obama's ability to keep his word.
"I think you're wrong," Bieber tweeted in response Thursday afternoon. "pretty sure President @BarackObama will keep this promise. #payitforward"

A White House official told DNAinfo: "The president asked his staff to help connect them, which they did."
Wall, who lives in New Jersey with her mother and younger sister, was ecstatic last week after meeting Obama during an otherwise solemn wreath-laying ceremony at Ground Zero.
She said she initially wrote to Bieber to tell him how much he meant to her, and when she didn't hear back, she wrote to Obama instead, asking him if he could help.
"Justin Bieber inspired me to share my story," Wall said after getting a hug from the president last week.
Her father, Glen Wall, a partner at Cantor Fitzgerald, was killed in Tower 1 on 9/11. He was 38 years old.
The Wall family did not immediately respond to a call for comment Thursday.