After leaving By Divine Right, Feist began sharing an apartment with a fellow independent musician, Merrill Nisker. As Nisker began shaping her lascivious stage persona Peaches, Feist became part of the act, performing with sock puppets on-stage, providing backing vocals, and singing on Peaches' debut album The Teaches of Peaches. (She would also contribute vocals to Peaches' 2006 album Impeach My Bush.) After touring the U.K. with Peaches, in 2001 Feist returned home to Toronto and was invited to join the indie rock band and musicians' collective Broken Social Scene by founder Kevin Drew. After touring with Broken Social Scene, she contributed vocals to their 2002 album You Forgot It in People, which earned rave reviews as well as a Juno award for Alternative Album of the Year. Later in 2002, Feist left Toronto for Paris, France, and with the help of producers and instrumentalists Chilly Gonzales (whom she had met while working with Peaches) and Renaud Letang (best known for his work with Manu Chao), she began work on her second solo effort. Released in 2004, Let It Die was a strikingly accomplished fusion of pop, folk, indie, electronic, and Latin influences, which provided an impressive showcase for Feist's cool but powerful vocal stylings. The album won enthusiastic reviews and impressive sales by indie standards, while the track "Mushaboom" became a successful single; Let It Die won the Juno Award for Best Alternative Rock Album, while Feist took home the trophy for Best New Artist.
As Feist worked on her third album, in 2006 she released a collection called Open Season, which featured remixes, collaborative recordings, and other odds and ends. While Let It Die made Feist into a major indie success story, 2007's The Reminder turned her into a bona fide pop star; it entered the Canadian album charts at number 2, and debuted at number 16 in the United States. The album was already selling well when Apple used the song "1234" in a TV spot for the iPod Nano; the commercial seemingly did as much to sell the song as it did the audio player, and pushed "1234" into the Top Ten of the U.S. singles charts on the strength of paid downloads alone. "My Moon, My Man" and "I Feel It All" also fared well as singles, and The Reminder earned Feist a gold record in the United States, and sold over a million copies internationally, as well as winning her another five Juno awards.
The success of The Reminder led to a number of interesting collaborations for Feist: she appeared on Stephen Colbert's 2008 holiday special A Colbert Christmas: The Greatest Gift of All, sang a duet with Jeff Tweedy on Wilco's 2009 release Wilco: The Album, contributed to a Skip Spence tribute album curated by Beck (it also featured Wilco, Jamie Lidell, and James Gadson), appeared in a short film directed by Kevin Drew titled The Water, and performed a rewritten version of "1234" on Sesame Street with the Muppets. She also reunited with Broken Social Scene for a handful of live appearances, one of which was shot by director Bruce McDonald for the film This Movie Is Broken. However, while Feist was enjoying working with others, she put a self-imposed moratorium on creating new music of her own for several years, instead working with filmmaker Anthony Seck on a documentary about the recording of The Reminder and her subsequent concert tour, entitled Look at What the Light Did Now. In 2011, Feist returned with a new album, Metals, a low-key set that was well received but noticeably less poppy than The Reminder. Paradoxically, Feist followed the release with a highly unlikely collaboration: a split single with the witty heavy metal band Mastodon, produced for Record Store Day 2012, with Feist covering Mastodon's "Black Tongue," while the band interpreted her song "A Commotion." ~ Mark Deming, Rovi