According to the Nielson ratings the Syracuse v. Michigan game was the #2 most watched (17.1 million) for the week of April 1-7th. This can be found near the bottom of this article.
http://tv.yahoo.com/news/country-music-upset-nielsen-ratings-192335229.html
http://tv.yahoo.com/news/country-music-upset-nielsen-ratings-192335229.html