No surprises here - Mary-Kate and Ashley Olsen have been named the richest Hollywood stars under 21 by Forbes mag. Dualstar, the twins's company, pulled in close to $40 million in 2006. Harry Potter actor Daniel Radcliffe landed in second place on the list, earning an estimated $13 million last year, and rounding out third was tabloid fav Lindsay Lohan. Also in the top ten were Dakota Fanning, Amanda Bynes, Hayden Panetierre, Vanessa Anne Hudgens, Abigail Breslin, Tyler James ...