"Girlfriend" is a song by the American boy band NSYNC featuring Nelly. It was released on January 14, 2002, as the third single from NSYNC's fourth album, Celebrity. It was the group's last song to enter the Top 10 of the US Billboard Hot 100, peaking at number 5. "Girlfriend" reached number 1 in Canada and charted within the Top 10 in six other countries, including Australia, Germany, and the United Kingdom. This was the last single and song the band released in their career before their reunion in 2023.