Justin Bieber greets fans during the 2012 Much Music Video Awards in Toronto on June 17, 2012. The Canadian Football League is offering a diverse mix of performers for the halftime show of the 100th Grey Cup. Teen heart-throb Justin Bieber, singer-songwriter Gordon Lightfoot, pop-rock group Marianas Trench and pop star Carly Rae Jepsen will perform at halftime of the league's championship game Nov. 25 at Rogers Centre, the CFL announced Saturday. THE CANADIAN PRESS/Chris Young