"Bye Bye Bye" is a song by American boy band NSYNC from their third studio album, No Strings Attached. It was released on January 17, 2000, as the lead single from the album. The song was written and produced by Kristian Lundin and Jake Schulze, with additional writing by Andreas Carlsson. Its lyrics describe the end of a romantic relationship; it was reported to also reference the group's separation from their manager Lou Pearlman and their record label RCA Records.

"Bye Bye Bye" was a commercial success, peaking at number 4 on the US Billboard Hot 100 and within the top 10 in almost every country in which it charted. The song received a Grammy nomination in 2001 for Record of the Year, but lost to U2's "Beautiful Day".