Adam Lambert performed at The Beacon Theatre in New York this weekend for "Cydi Lauper & Friends: Home For The Holidays" a charity event.
They dueted on "Mad World" for the event that raises awareness for lesbian, gay, and transgender youth homelessness.
Whoopi Goldberg and Roberta Flack also attended the event.
Watch the performance above.-DocFB
Diagnosis: Would LOVE to see them duet on "Money Changes Everything"