Jamie Foxx ran through his many hits during his “Live on Letterman” mini-concert at New York’s Ed Sullivan Theater before sitting down with David Letterman on Tuesday’s “Late Show.” The entertainer discussed the tattoo on the back on his head, singing like a school girl for Prince, and buying a horse for Robert Downey Jr. He also encouraged crowd participation while singing “Yep Dat’s Me,” the new single from his album Best Night of My Life, during the televised broadcast.