OK, the party is officially over. Keselowski enters a new realm now. As defending champion he faces a brighter spotlight and more intense focus on each and every remark he makes. Outspoken and personable, he embraces the idea of being a new kind of champion and yearns for a leadership role in the sport. How will he mesh that with adjusting to a new car, new manufacturer and new teammate in 2013? Watch closely. (Alex Trautwig/Getty Images) Courtesy of FOXSports.comThe opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.