"Doesn't Really Matter" is a song by American singer Janet Jackson from the soundtrack to the 2000 film Nutty Professor II: The Klumps, and her seventh studio album All for You (2001). It was written and produced by Jackson, Jimmy Jam and Terry Lewis. The track was sent to contemporary hit radio in the US on May 23, 2000, after an unmastered version was leaked to several radio stations. It is an upbeat electropop, R&B and dance song with a syncopated drum loop and bassline. Based on a previously discarded poem Jackson wrote, the lyrics are about her film character's love for The Nutty Professor. The track received generally positive reviews from music critics, who praised its upbeat sound and Jackson's breathy voice. "Doesn't Really Matter" topped the Billboard Hot 100 for three consecutive weeks, becoming the singer's ninth US chart-topper. It was Jackson's 19th single to be certified gold by the Recording Industry Association of America (RIAA), making her only the third singer, after Madonna and Whitney Houston, to achieve this feat. The song peaked at number five on the UK Singles Chart, becoming Jackson's 15th single to reach the top 10 in the UK. It also peaked within the top 10 in Canada, Denmark, Poland, Italy, and Spain. The Joseph Kahn-directed music video resembles an abstract, futuristic environment based on Japanese culture. It features an AIBO, a prototype of the Acura CL-X, morphing clothes, and a dance sequence on a tilting platform. Production of the video costed over $2.5 million (equivalent to $3.8 million in 2020), making it one of the most expensive music videos of all time. To promote the single, Jackson performed it on British television program Top of the Pops and at the 2000 MTV Video Music Awards. The song was also performed during four of the singer's concert tours, and her 2019 Las Vegas residency, Janet Jackson: Metamorphosis.