Jamie Foxx: Rumors abound that the tattoo on the back of the actor's head (see pictures) covers up scars left by a hair transplant.

David Letterman: The late-night comedian jokes about his "toupee" all the time.

Donald Trump: Some are saying The Donald's toddler son, Barron (see pictures of the cutie), has his daddy's hair. Does that prove once and for all it's not a rug?

Ted Koppel: The veteran news anchor has spoken about the "rug" rumors in at least a couple commencement speeches. (What did he say?)