Leighton Meester is the cover girl for the April issue of Marie Claire magazine, which hits newsstands on Tuesday, March 20th. Check out some highlights from inside the mag where she chats about growing up, having adult concerns as a child and relationships: On her family life growing up: "My family has a crazy history. Probably the craziest I've heard of." She continues: "I look back now and I see it in a nice light. ...