The event, which took place December 17th in Los Angeles, California, also featured performances by Colbie Caillat and Drake Bell and appearances by Mario Lopez and the most-searched person of 2011, Rebecca Black.
Watch full performances from the concert here and enter for a chance to win $1000 and a trip to L.A.!
For Cody, giving back to The Salvation Army was nothing new. "I actually grew up donating and giving back to The Salvation Army," he said. "I think its important to start small and that can make a big difference."
Greyson told fans he donates old clothing or extra bracelets to the cause, while Honor Society talked about giving back on their recent Rock The Red Kettle tour.
"We've been touring all over the country doing concerts at night and volnteering our time during the day," Michael Bruno said. The band's bassist Andrew Lee continued, "We've worked with them now for a couple years and we're just trying to raise awareness, spread the message and get people to donate their time and money."
Check out the PSA videos below and to see performances from the Rock The Red Kettle concert, click here.