
Lambert, who will emcee the 2012 Vhi Divas concert this Sunday, was a part of a celebrity-studded event for the second annual "Cyndi Lauper & Friends: Home for the Holidays", which raises awareness on lesbian, gay, bisexual and transgender youth homelessness and supports the True Colors Fund's Forty to None Project.
Before taking the stage with his friend Lambert, who gave a memorable performance of "Mad World" when he was on "American Idol," gushed to the crowd, "I can’t believe she asked me to do this! This is amazing.”
Check out the performance in the video above.