A familiar face once again tops Forbes' list of the world's richest billionaires.
Find out which billionaire tops Forbes' list of the richest people on the planet for 2015.
Harry How/Getty Images
Ethan Miller/Getty Images for Clear Channel
Ian Waldie/Getty Images
Jason Kempin/Getty Images
Adele.com via CNN
Sign up for Breaking News, Daily Headlines, Severe Weather Alerts & more!