I think she's got a pretty good head on her shoulders but also,she IS a fairly young girl who enjoys being a little "out there". I'm going to guess that she's a bit like my sweetiepants in that department: if you met her you'd probably think she was just an airhead and hell,I'm STILL finding out she has awesome ninja skills that she keeps hidden.Much in the same way she's done things like walked by a piano,played amazingly for 10 seconds and then shrugged "that's the only thing I know" I'm thinking that her goofing off is playing to the camera and to the stereotype.