"Judas" is a song by American singer Lady Gaga, recorded for her second studio album, Born This Way (2011). It was released by Interscope Records on April 15, 2011, as the second single from the album. Written and produced by Lady Gaga and Nadir "RedOne" Khayat, it is an electro house song about a woman in love with a man who betrayed her. It embodies the incidents that have haunted Gaga in the past, and its core meaning refers to the negative parts of her life that she cannot escape. Gaga has further explained that the song was also about honoring one's inner darkness in order to bring oneself into the light. The artwork for the single was designed by Gaga in Microsoft Word. In spite of a polarizing impact on several religious groups, the song was generally well received by critics, who likened the song to "Bad Romance" with some noting it should have been the album's lead single.

Stefani Joanne Angelina Germanotta, known professionally as Lady Gaga, is an American singer-songwriter and actress. She is known for reinventing her image and showcasing versatility in entertainment. Gaga started performing as a teenager by singing at open mic nights and acting in school plays. She studied Collaborative Arts Project 21 before leaving to pursue a music career. After a contract cancellation by Def Jam Recordings, Gaga worked as a songwriter for Sony/ATV Music Publishing. In 2007, she signed with Interscope Records and KonLive Distribution. Her breakthrough came the following year with her debut studio album, The Fame, and its singles "Just Dance" and "Poker Face". The album was later reissued along with The Fame Monster (2009), which yielded the successful singles "Bad Romance", "Alejandro" and "Telephone".