"Doesn't Really Matter" is a song recorded by American R&B-pop singer Janet Jackson for the soundtrack to the 2000 film Nutty Professor II: The Klumps. Released as a single in July 2000, the track later appeared on Jackson's seventh studio album, All for You(2001).

The song was the lead single from the Universal Pictures film Nutty Professor II: The Klumps, in which Jackson co-starred with actor Eddie Murphy. It became Jackson's ninth number one on the Hot 100 and first in the 2000s, staying atop for three weeks, and also making Jackson the first artist in history to score number-one singles in the '80s, '90s, and '00s. An alternate mix of the song was later included on Jackson's seventh studio album, 2001's All for You. Jackson performed this version at the 2000 MTV Video Music Awards. The song was used in the dance video game Dance Dance Revolution SuperNova, and was covered in Japanese by Hitomi Shimatani and re-titled "Papillon" (Jackson's character's name). Jackson performed the song on her All for You Tour and Rock Witchu Tour.

The music video, directed by Joseph Kahn, shows Jackson in an abstract anime-based, futuristic Japan, featuring an AIBO dog, morphing clothes, levitating platforms, and a futuristic Acura vehicle. Also, behind her and her dancers screens show various scenes from the Dreamcast games Jet Grind Radioand Shenmue. It was featured on MTV's Making the Videoon June 28, 2000. The video was only available on the enhanced CD single, and on the Nutty Professor IIDVD as part of an extra feature. It was not released on any of Jackson's video compilations. Janet Jackson discovered the lyrics in a notebook she found lying around. She thought it would go well with the movie. She didn't change anything about the song except the beat. The lyrics stayed the same. The music video was featured on a VHS release on Nutty Professor II: The Klumps.