"Doesn't Really Matter" is a hit song recorded by American singer-songwriter Janet Jackson for the soundtrack to the film Nutty Professor II: The Klumps (2000). It was written and produced by Jackson and Jam & Lewis. The song was released on May 21, 2000, after an unfinished version leaked to radio. "Doesn't Really Matter" is an electropop song which speaks about loving a person for who they are and disregarding their physical appearance. It was based on an incomplete poem Jackson had written, which was later applied to her character in the film. The song was a contrast from the bleak tone of prior album The Velvet Rope (1997), returning to a brighter and more contemporary sound.

"Doesn't Really Matter" received positive reception, called "impossibly catchy" and "classic pop". It became Jackson's ninth number one in the United States and stayed atop the chart for three weeks, making her the first artist to have a number one hit in three separate decades. It was Jackson's twenty-first single to be certified, which ranked her as the second female artist with the most certified singles. The song fared well internationally, reaching number five in the United Kingdom, within the top ten in Italy and Denmark. It attained a silver certification in the United Kingdom, and allowed Jam and Lewis to receive a Grammy nomination for Producer of the Year. The single is featured in the fifth edition of the American Now! compilation album series Now That's What I Call Music! 5 (2000) and was later included in two of Jackson's greatest hits collections, Number Ones (2009) and Icon: Number Ones (2010).

The music video, directed by Joseph Kahn, resembles an abstract, futuristic environment based on Japanese culture. It features advanced technology, morphing clothes, and a dance sequence on a levitating platform. The video had a reported cost of over $2.5 million, being one of the most expensive music videos of all time. Its accolades include "Outstanding Music Video" and "Most Stylish Music Video" at the VH1 Fashion Awards. The song was performed on Top of the Pops and the MTV Video Music Awards, the latter regarded as one of the leading performances of Jackson's career.

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