‘Dancing Queen’ by ABBA peaks at #1 in USA 40 years ago #OnThisDay #OTD (Apr 9 1977) April 9, 20171970s, Popular Music 1970sadmin (Saturday, April 9, 1977) — “Dancing Queen” by ABBA peaked at #1 on today’s Billboard Hot 100 singles chart for one week. Share this:TweetRedditLike this:Like Loading... Related