65m Facebook users posted 265m posts, comments and likes relating to Super bowl 2015

"Facebook joined in on the action, with the Super Bowl XLIX being discussed by 65 million people, generating 265 million posts, comments and likes, according to Catalyst, a PR and research agency. 2014's Super Bowl game only saw 50 million join in on the debate via Facebook.
The Patriots' victory was the most-talked about topic on Facebook, with 1.36 million people commenting every minute, followed by Katy Perry's "Firework" finale (1.02 million people per minute); according to Facebook's data team."

Source:  CNBC, 2nd February 2-15