"Poker Face" is a song by American singer Lady Gaga from her debut studio album, The Fame (2008). It was released on September 26, 2008 as the album's second single. "Poker Face" is a synthpop song in the key of G♯ minor, following in the footsteps of her previous single "Just Dance", but with a darker musical tone. The main idea behind the song is bisexuality and was a tribute by Gaga to her rock and roll boyfriends. The song's lyrics finds the protagonist talking about sexual innuendos.

"Poker Face" was acclaimed by most critics, who praised the robotic hook and the chorus. The song attained worldwide success, topping the charts in twenty countries including the United States, United Kingdom, Australia, New Zealand, Canada and many European countries. "Poker Face" is the best-selling single of 2009 worldwide, with over 9.5 million in sales. It is among the best-selling singles of all time, having sold over 14 million copies. The accompanying music video for the song portrays Gaga singing it in various costumes and playing strip poker in a getaway villa.

Gaga performed the song for the eighth season of the television show American Idol as well as the Fame Ball and Monster Ball tours. The live performances included an electronic version and an acoustic version, which she played on the piano. It was nominated for both Song of the Year and Record of the Year at the 52nd Grammy Awards, and won the Award for Best Dance Recording.

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