Nick Lachey is using his voice to raise awareness about autism.
Earlier this month, the 42-year-old singer joined stars such as Bruno Mars, Holly Robinson Peete, Niecy Nash and Martin Lawrence for the Micah's Voice "Back in the Day" 2nd Annual Benefit Concert in Woodland Hills, California.
Lachey, who has spoken to ET before about the need for more autism research, was happy to attend the event, as his adopted brother, Zac, suffers from Asperger's syndrome, a developmental disorder on the autism spectrum.
"It's a disease we're still trying to figure out, and make some sense of," he said. "Nights like this raise great money to help try and do that."
Peete also voiced her overwhelming love for Micah's Voice. Her son, RJ, has autism, and she and her husband, Rodney Peete, formed a non-profit called HollyRod Foundation in 1997 to provide care to those living with autism and Parkinson's disease.
"I couldn't wait to come out and support their [Micah's Voice founders Shawn and Sharhonda Stockman] efforts," she said. "Autism is the fastest growing developmental disorder in the world, and we need more and more and more awareness."
Micah's Voice is a non-profit foundation created by Boyz II Men singer Shawn Stockman and his wife, Sharhonda Stockman, to provide financial and community support for families affected by autism. One of the Stockman's twin sons, Micah, was diagnosed with autism when he was younger.
Director J.J. Abrams recently made out with Chewbacca in the name of autism awareness. Learn more about his interesting approach in the video below.