Watch O-Town perform on Good Day LA + backstage interview

O-Town, the boy band that first formed in the series "Making the Band" and rose to fame in the early 2000s, is touring together again and making music for a new generation of fans.

The group performed its new single "Hello World" and the classic hit "All or Nothing" as part of the Good Day LA Mercury Insurance Concert Series.

"Hello World" was co-written by bandmember Jacob Underwood and former NFL player and "Bachelor" star Colton Underwood.

The song is intended to raise awareness for Underwood's charity, The Legacy Foundation, which was created to empower those with cystic fibrosis to live fully and support each other. It raises funds for research and provides equipment and resources for people of all ages living with the life-threatening disorder.

The band said 100 percent of the proceeds from "Hello World" will be donated to the foundation.

O-Town joined us after their performances for an interview backstage, where they also sang a capella!

Catch O-Town April 5 at Sainte Rocke in Hermosa Beach, April 6 at The Rose in Pasadena and April 25 at Music Box in San Diego. For more show dates, click here.