"1234" is a song from Feist's third studio album, The Reminder. The song was co-written by Sally Seltmann, an Australian singer-songwriter who also recorded under the stage name New Buffalo, and Feist. It remains Feist's biggest hit single in the USA to date, and her only song to chart on the Billboard Hot 100 and UK Top 40.

In an interview with Songfacts, Sally Seltmann said:

I had been listening to Feist's album Let It Die. I thought my little song about lost love, and the hope to recapture what you once had, sounded too much like a Feist song for me to use for New Buffalo, so I shelved it. Then, in late 2005 I did a tour across Canada supporting Feist, and Broken Social Scene. After meeting Feist, I started to wonder whether she might like to do a cover of "1234," but I was too shy to tell her about it. At the last Broken Social Scene show, I plucked up the courage to tell her that I had written a song which I thought she might like to use. We went onto the tour bus, and I recorded a simple version of the song into her laptop, with guitar and vocals. To my surprise, she loved the song, and started playing it live.

On 14 December 2005, Feist played the song live at The Trabendo in Paris, France in a show broadcast on Europe2 TV, with the title "Sally's Song" and with somewhat different lyrics than in the commercially released version.

The original version of the song was mixed by Renaud Letang. It was later remixed by Van She Tech, an offshoot of the band Van She.

"1234" was nominated for Grammy Awards in the categories of Best Female Pop Vocal Performance and Best Short Form Music Video. Likewise, the success of the song largely contributed to Feist's other nominations that year for Best New Artist and Best Pop Vocal Album. It also won the Juno award for Single of the Year on 6 April 2008 in Calgary.

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