In 1980, CBS, with a record bid of US$12 million, won the national radio rights to 26 NFL regular season games, including Monday Night Football, and all 10 postseason games for the 1980–1983 seasons. Starting in 1980, CBS frequently used the beginning guitar riff of Heart's ""Crazy on You"" when they went to commercial. Television ratings in 1980 were the second-best in NFL history, trailing only the combined ratings of the 1976 season. All three networks posted gains, and NBC's 15.0 rating was its best ever. CBS and ABC had their best ratings since 1977, with 15.3 and 20.8 ratings, respectively. CBS Radio reported a record audience of 7 million for Monday night and special games.