This is why you saw "Justin Guarini as Lil Sweet" briefly in those Dr. Pepper ads, lest they get on the wrong side of Prince's estate: https://www.youtube.com/watch?v=-1H_CaCR46M

More recently, there was the Michelob Ultra commercial that had a ton of look (and a sound) alikes, but they basically one by one said "this isn't the person you thought it was". https://www.youtube.com/watch?v=ZCk9vfbnlfA