Sally Mary Seltmann (born Sally Mary Russell, 11 September 1975) is an Australian singer-songwriter, multi-instrumentalist and producer. From 2000 to 2009, Seltmann used the stage name, New Buffalo. Under that name, Seltmann wrote, performed, arranged and produced her debut album, The Last Beautiful Day in September 2004. Her second album, Somewhere, Anywhere appeared in March 2007. Seltmann and Canadian singer-songwriter Feist, co-wrote the song "1234" (originally "Sally's Song") which was featured in a 2007 iPod Nano commercial. It became a Top 10 hit on the United States Billboard Hot 100 for Feist. Seltmann is married to Darren Seltmann of electronic music group, The Avalanches. In April 2010, Seltmann released her third solo album, Heart That's Pounding. Late that year, she formed an indie rock trio, Seeker Lover Keeper, with fellow Australians Sarah Blasko and Holly Throsby. They issued a self-titled album in June 2011, which peaked at number three on the ARIA Albums Chart.

As a songwriter, Seltmann has won Australasian Performing Right Association awards for Professional Development – Pop/Dance Music in 2001 and Breakthrough Songwriter of the Year in 2008. At the ARIA Music Awards of 2007 she was nominated for Best Adult Contemporary Album for Somewhere, Anywhere.