Swift began professional songwriting at age 14. She signed with Big Machine Records in 2005 and achieved prominence as a country pop singer with the albums Taylor Swift (2006) and Fearless (2008). She experimented with rock and electronic styles on her next albums, Speak Now (2010) and Red (2012), respectively, with the latter featuring her first Billboard Hot 100 number-one single, "We Are Never Ever Getting Back Together". Swift recalibrated her image from country to pop with 1989 (2014), a synth-pop album containing the chart-topping songs "Shake It Off", "Blank Space", and "Bad Blood". Media scrutiny inspired the hip-hop-influenced Reputation (2017) and its number-one single "Look What You Made Me Do". After signing with Republic Records in 2018, Swift released the eclectic pop album Lover (2019) and the autobiographical documentary Miss Americana (2020). She explored indie folk styles on the 2020 albums Folklore and Evermore, subdued electropop on Midnights (2022), and re-recorded four albums subtitled Taylor's Version after a dispute with Big Machine. These albums spawned the number-one songs "Cruel Summer", "Cardigan", "Willow", "Anti-Hero", "All Too Well", and "Is It Over Now?". Her Eras Tour (2023–2024) and its accompanying concert film became the highest-grossing tour and concert film of all time, respectively. Swift has directed videos and films such as Folklore: The Long Pond Studio Sessions (2020) and All Too Well: The Short Film (2021). Swift is one of the world's best-selling artists, with 200 million records sold worldwide as of 2019. She is the most-streamed artist on Spotify, the highest-grossing female touring act, and the first billionaire with music as the main source of income. Six of her albums have opened with over one million sales in a week. The 2023 Time Person of the Year, Swift has appeared on lists such as Rolling Stone's 100 Greatest Songwriters of All Time, Billboard's Greatest of All Time Artists, and Forbes' World's 100 Most Powerful Women.