1977: ABBA earned their only number 1 hit in the United States when "Dancing Queen" went to the top. The song also led the charts in 13 other countries.
1973: Gilbert O'Sullivan scored his second UK #1 with "Get Down". It reached #7 in the US.
1979: "Music Box Dancer" by Canadian pianist Frank Mills became the number-one single in the US, the first instrumental in several years to reach the top of the charts. In Mills' home country, the record only made it to #47.
1965: The Beach Boys record "California Girls", which will reach number three in the US by August. In 2004, the song was ranked #71 on Rolling Stone's list of The 500 Greatest Songs of All Time.
1971: Chicago became the first American Rock group to perform at Carnegie Hall. They played six sold out shows and recorded the concerts for the four-record album, "Chicago at Carnegie Hall", which became their third LP to make the top 5 in the US.