"Yesterday Once More", written by Richard Carpenter and John Bettis, is a hit song by The Carpenters from their 1973 album Now & Then. Composed in the key of E, "Yesterday Once More" features a long middle section, consisting of eight covers of 1960s tunes incorporated into a faux oldies radio program. The work takes up the entire B-side of the album.

The single version of the song peaked at number 2 on the Billboard Hot 100 chart becoming their 5th number two hit and making them the act with the second most number two hits on the chart behind only Madonna. The song also peaked at number 1 on the easy listening chart, becoming their eighth number 1 on that chart in four years. It is The Carpenters' biggest-selling record worldwide and their best-selling single in the UK, peaking at number 2. Richard Carpenter admitted, on a Japanese documentary, that it was his favorite of all the songs that he had written. He has performed an instrumental version at concerts.

According to Cash Box, on June 2, 1973, "Yesterday Once More" was the highest-debuting single at No. 71. By August 4, it had reached No. 1.

Dionne Warwick, a close friend of The Carpenters, performed the song live in Las Vegas the night before Karen Carpenter's death in 1983.

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