Big Time Rush surprises bullied girl whose brother wrote viral letter to Santa

A little boy's request to Santa has been honoured.

At the urging of his budget-conscious mother, eight-year-old Ryan wrote a letter to Santa with his Christmas wish list earlier this month.

In it, he put his twin sister first.

"Kids at school are still picking on Amber and its [sic] not fair because she doesnt [sic] do anything to them and it makes me mad," he wrote. "I prayed that they would stop, but god is bisy [sic] and needs your help,"

He ended the letter with a request for an early Christmas present: that Amber's favourite band play at her birthday party.

"Can you ask Big Time Rush to come to Amber's B-day party? It will make her so happy."

Ryan's letter was posted as a CNN iReport where it quickly went viral.

Also see: Eight-year-old asks Santa to help his bullied sister

"It's amazing and overwhelming at the same time," the twins' mother, Karen Suffern, says of the outpouring of love and support for her family online.

The twins visited Good Morning America on Friday.

As a huge surprise for Amber, Big Time Rush showed up, too, and serenaded the thrilled grade 3 student.

The Sufferns were VIP guests of the band at a concert this weekend in New York City.

"When a story goes viral, it is not one person who makes it happen. It is millions," Tony Posnanski, who shared Ryan's letter on CNN iReport, wrote on his Facebook page. "Millions who take a story and find a piece of themselves in it."

"I am just happy I saw Karen's message. I am glad I submitted it to CNN/iReport instead of posting it on my page. I am glad that people on this page responded to it and glad that CNN made it a worldwide story. But I am happy that Karen was brave to want her story out. It is not easy to do...but worthwhile. Her kids will have a better life from it. A lot of kids will."

Also see: Mom gives bullied daughter dream prom

Karen Suffern thanked Posnanski publicly on Facebook for sharing her family's story.

"Before this went viral, I didn't think I could expose my vulnerability to millions of judging eyes. However, I realized this was bigger than my discomfort. You played a great role in making Ryan and Amber's wish come true and you've helped a lot of people who wanted to reach out to help get to me. I wanted to say thank you, again. Thank you doesn't seem adequate enough."

Since Ryan wrote his letter, Suffern has been in communication with her children's school, determined to make things better for her bullied daughter.

"The school has been in touch and they’re making sure my daughter feels comfortable and safe," Suffern tells WTMA. "They moved her on the bus because about 98 percent of the bullying takes place on the bus. She’s now sitting with her cousin who’s much older than Amber is."

"Today and yesterday she didn’t wake up begging me to let her stay home, so I guess that’s a good sign," she adds.