"Millionaire" is a song by American singer-songwriter Kelis, featuring American rapper André 3000. It was released on October 18, 2004 as the third single from Kelis' third studio album, Tasty (2003). The song was written by Kelis and André 3000, the latter of whom also produced it. Like Kelis' previous single "Trick Me", "Millionaire" was not released in the United States. The track is built on a sample of the 1985 song "La Di Da Di" by Doug E. Fresh and Slick Rick.
The song peaked at number three on the UK Singles Chart, earning Kelis her third consecutive top five hit, while becoming a modest success on the charts internationally. The accompanying music video, directed by Giuseppe Capotondi, does not feature Kelis or André 3000, and instead features children playing the roles of young Kelis and André.
"Millionaire" debuted at number three on the UK Singles Chart, becoming Kelis' third consecutive top five hit from Tasty. The song performed moderately in the rest of Europe, reaching number eight in Ireland, number eleven in Finland, number thirty-six in Belgium, number forty-three in Switzerland, and number fifty in Sweden. In Oceania, the single charted at number twenty-three in Australia and at number twenty-seven in New Zealand.