"Don't Mess with My Man" is a song recorded by American R&B singer Nivea, featuring Brian and Brandon Casey from the group Jagged Edge. It was released in August 2002 as the third single from her self-titled debut album (2001). The song peaked at number eight on the Billboard Hot 100 and was an international hit as well, reaching the top 10 in France and New Zealand and receiving a Gold certification in the former country. In the United Kingdom, the song was released twice: once as a solo single in 2002—reaching number 41 on the UK Singles Chart—and again as a double A-side with "Laundromat" in 2003, reaching number 33 on the same chart. The recording earned the artists a nomination for Best R&B Performance by a Duo or Group with Vocals at the 45th Grammy Awards in 2003.