Lady Gaga’s 'Poker Face' was the song that cemented her status as a global pop icon. Produced by RedOne, the track features a robotic vocal hook 'Ma-ma-ma-ma' that was inspired by Boney M.'s 1977 hit 'Ma Baker.' The song reached number one in 20 countries and was the best-selling single of 2009 worldwide. While many fans thought the song was just about gambling and facial expressions, Gaga later revealed that the lyrics have a deeper meaning about her bisexuality and the experience of being with a man while fantasizing about a woman. The song’s synth-pop sound was a departure from the R&B that dominated the charts at the time, helping to usher in a new era of electronic-heavy pop music. It won a Grammy for Best Dance Recording and its music video, featuring Gaga’s futuristic outfits and 'disco stick,' became an instant pop culture classic.