who painted the sixteenth chapel
David Letterman Rips Justin Bieber for Ignorant Remark. 1. 6/22/2012 7:10 AM PDT. Justin Bieber is 18 years old ... and believes Michelangelo painted the Sixteenth Chapel ... and last night, David Letterman ripped him for it. Bieber was showing off his new arm tattoo on the Late Show ... when Dave, acting like a cranky disapproving old man, reached over and grabbed the fresh ink, causing Justin to scream out in pain.