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General Motors and Facebook have restarted talks. According to Adweek.com, Joel Ewanick, GM's head of global marketing, and Facebook global head of sales Carolyn Everson recently met during the Cannes Lions Festival of Creativity in France. Those conversations eventually led to talks between GM CEO Dan Akerson and Facebook chief operating officer Sheryl Sandberg, indicating the automaker may be interested in restarting its advertising efforts with the social media giant.

GM dealt Facebook a serious blow when the manufacturer pulled its ad commitments with Facebook just days before the site went public. The automaker reportedly spent $10 million on Facebook ads, but said the efforts were largely wasted. The departure sparked a larger conversation about the value of social media marketing and may have contributed to Facebook's stock faltering shortly after going public.

Neither GM nor Facebook are commenting on whether the automaker will reopen its advertising account.