Who was the prime-time host of 12 Olympic Games that Michele O'Callaghan did makeup for?
Michele O'Callaghan:  O'Callaghan also did makeup for Bob Costas and Bryant Gumbel, as well as dozens of sports shows on every TV network. Bob Costas: Robert Quinlan Costas (born March 22, 1952) is an American sportscaster, on the air for NBC Sports television since the early 1980s. Bob Costas:  He was the prime-time host of 12 Olympic Games, from 1992 until 2016.
Robert Quinlan Costas