"Beautiful Liar" (Spanish: "Bello Embustero") is a song recored by American R&B singer Beyoncé and Colombian Latin pop singer Shakira. The song was written by Knowles, Amanda Ghost, Ian Dench, and Stargate members Mikkel S. Eriksen and Tor Erik Hermansen, and produced by Stargate and Knowles for the re-release of her second solo album, B'Day (2006). A Spanish and English mixed version of the song was produced called "Bello Embustero". The song was mixed by Gustavo Celis. It was the first single released from the deluxe edition of the album through Columbia Records on March 14, 2007.
"Beautiful Liar" is about female empowerment and lyrically, the song finds the two female protagonists singing about being charmed by the same man, however instead of fighting over him, both ladies agree and realize that he is not worth their time. The single was generally well-received by music critics who praised the fact that Knowles and Shakira managed to come with a beautiful collaboration by forbidding their vanity or ego from getting in the way of business. The track won at the 2007 MTV Video Music Award for Most Earth-Shattering Collaboration. In 2008, the song was awarded an Ivor Novello Awards for Best-Selling British Song.
"Beautiful Liar" was a commercial success in 2007. It reached a peak at number three on the US Billboard Hot 100 and it held the distinction of having the largest upward movement on the this particular chart until in 2008. The song became a chart topper in several European countries including France, Germany, Hungary, Ireland, Italy, the Netherlands, New Zealand, Switzerland and the United Kingdom. The accompanying music video for the single, which incorporates belly dancing moves, was directed by English director Jake Nava. "Beautiful Liar" was nominated for Video Of The Year at the 2007 BET Awards and it won the Most Earthshattering Collaboration at the 2007 MTV Video Music Award. The song was a part of her set list on The Beyoncé Experience in Los Angeles and her world tour, I Am... Tour.