The Serial Daters Of 2011

December 15th, 2011 4:00pm EST

Blake Lively

Some folks just can't settle down. Here are the serial daters of 2011: The celebs that hooked up with the most people!

After splitting with Penn Badgely in late 2010, Blake Lively took a tour of Hollywood's hunks. After a summer of romance with Leonardo DiCaprio, she hit it off with Green Lantern co-star Ryan Reynolds.

Watch "Dating Machines of 2011"