American singer-songwriter Taylor Swift has released 57 singles as lead artist, 8 singles as a featured artist, and 36 promotional singles. She had sold over 150 million singles worldwide by December 2016. According to the Recording Industry Association of America (RIAA), Swift's digital singles have achieved 137.5 million certified units, based on sales and on-demand streaming, . With 188 chart entries on the Billboard Hot 100 (including 9 number-ones and 40 top-tens), Swift is the female artist with the most charted songs in the United States. Swift's first chart appearance on the Billboard Hot 100 was "Tim McGraw", the lead single from her 2006 self-titled debut album. The album's third single, "Our Song", made Swift the youngest person to single-handedly write and sing a number-one song on Hot Country Songs. Her second studio album, Fearless (2008), spawned two international top-ten singles—"Love Story" and "You Belong with Me"—the former was Swift's first number one in Australia. Fearless broke the record for the most tracks (13) peaking in the top 40 of the Billboard Hot 100. Her third studio album, Speak Now, included the US top-ten singles "Mine" and "Back to December". The lead single from Swift's fourth studio album Red (2012), "We Are Never Ever Getting Back Together", was her first number one in the United States and New Zealand. Another Red single, "I Knew You Were Trouble", became an international top-five chart hit. Swift's fifth studio album, 1989 (2014), spawned three Billboard Hot 100 number-one singles: "Shake It Off", "Blank Space", and "Bad Blood"; the first of which spent nearly six months in the top ten and was certified Diamond by the Recording Industry Association of America (RIAA). Two other singles, "Style" and "Wildest Dreams", peaked within the top ten. "Look What You Made Me Do", the US number-one lead single from her sixth studio album Reputation (2017), was her first number-one single in the United Kingdom. Another Reputation single, "Delicate", reached number one on Billboard airplay charts. Her seventh studio album, Lover (2019), was supported by three Billboard Hot 100 top-ten singles: "Me!", "You Need to Calm Down", and "Lover". With her eighth studio album, Folklore (2020), and its lead single, "Cardigan", Swift became the first artist to debut atop both the Billboard 200 and Hot 100 in the same week and broke the record for the most simultaneous Hot 100 chart debuts (16) by a woman. She scored