"Déjà Vu" is a song by American R&B singer-songwriter Beyoncé Knowles, featuring rapper artist Jay-Z. It was produced by Rodney "Darkchild" Jerkins and Knowles for her second solo album, B'Day. The song combines contemporary R&B and '70s funk and its varied instrumentation includes bass guitar, hi-hat, horns, and the Roland TR-808 drum machine. The song's title and lyrics refer to a woman being constantly reminded of a past lover.
The song was released as the album's lead single in July 2006. Although it was recognized as "Best Song" at the 2006 Music Of Black Origin (MOBO) Awards, "Déjà Vu" received mixed reviews from critics. The single entered the top ten on most charts, topping several of Billboard magazine's component charts and reaching number one in the United Kingdom.