"Poker Face" is a song by American recording artist Lady Gaga from her debut album, The Fame. Produced by RedOne, it was released as the album's second single in late 2008 for some markets and in early 2009 for the rest of the world. The song is an uptempo dance-pop 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 n' roll boyfriends. Lyrically, "Poker Face" is about sex and gambling.

"Poker Face" was well-received 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 also the most downloaded song in the British chart history. It is among the best-selling singles of all time, having sold over 9.8 million copies. The accompanying music video for the song portrays Gaga singing it in various costumes and playing strip poker in a getaway villa.