Kristen Stewart hair bounces high in the air as she strolls through the 2010 Sundance Film Festival in Park City, Utah on Sunday afternoon (January 24). The 19-year-old actress and costar Dakota Fanning caught up with Access Hollywood before the screening of The Runaways about how it was playing such iconic rockers. Kristen shared, “Especially after meeting them, because they [Cherie Currie an…