Examples of Famous Personal Brands:

Richard Branson - The world's most outgoing serial entrepreneur. Richard Branson, the founder of his countless Virgin businesses, is always doing something fun and exciting which the media raves about. This man is a complete package in terms of his personal brand and he communicates this across multiple sources without any PR incidents I've ever heard of.

Seth Godin - Whilst not all of his marketing theories stand true, he's done a great job at writing and has conveyed a likeable personality accross a variety of mediums (books, blogs etc.) to show his unique brand. With his background in marketing and his popularity throughout the marketing blogs community, he is doing a fantastic job of maintaing and building a professional image in the eyes of his followers.

Brad Pitt - As a Famous actor, Brad has starred in many movies - he has done an excellent job of acting and has therefore continually been granted roles in new movies. What you can learn from Brad Pitt's personal brand is that you need to be good at what you do in order to be successful. You also have to stay in the public eye so you can remain in the Top of Mind awareness of your target market.