‘Mamma Mia’ by ABBA peaks at #32 in USA 40 years ago #OnThisDay #OTD (July 4 1976) July 4, 20161970s, Popular Music 1970sadmin (Sunday, July 4, 1976) — “Mamma Mia” by ABBA peaked at #32 on today’s Billboard Hot 100 singles chart for two weeks. Share this:TweetRedditLike this:Like Loading... Related