It was a big night -- and day after -- for halftime star Bruno Mars, too. Nielsen said an estimated 115.3 million people watched Mars and his guests, the Red Hot Chili Peppers. That makes it the most-watched Super Bowl halftime show ever, eclipsing Madonna's performance two years ago.
Mars' album, "Unorthodox Jukebox," moved into No. 1 on the iTunes album chart on Monday, while his debut "Doo-Wops & Hooligans" is at No. 3. Mars has 11 songs in the top 100 of the iTunes singles chart.
The three biggest moments on Twitter were also the three most talked-about events on Facebook, that social media company said. Fifty million people accounted for more than 185 million game-related interactions on Facebook.
PBS turned to social media last week to promote its airing of "Downton Abbey" against the Super Bowl. The public broadcasting service asked on social media sites whether people wanted to watch drama or the game, and an estimated 6.8 million people watched "Downton Abbey" on Sunday. While that's down from the season average of 8.6 million, it was 200,000 more people than the British drama had going against the Super Bowl last year.
Fox said that 25.8 million people stuck around after the game to watch the comedy "New Girl" with Prince as guest. The Golden Globe-winning comedy "Brooklyn Nine-Nine," which followed "New Girl," had 14.8 million viewers.
Information from ESPN.com's Darren Rovell and The Associated Press was used in this report.