In sales week that ended two days after Christmas of 2010, her bratty debut single, "TiK ToK," smashed the record for highest single-week sales for a female solo artist with 600,000 digital downloads, according to Nielsen SoundScan (the previous record-holder, Lady Gaga's "Just Dance," sold 419,000 one year earlier), and soared to No. 1 on the Billboard Hot 100.
The Dr. Luke- and Benny Blanco-produced anthem took just 11 weeks to top the chart, holding the peak position for nine weeks on its way to becoming the longest-running No. 1 debut single by a female artist since 1977, and the highest-selling digital single of all time, second only to the Black Eyed Peas' "I Gotta Feeling," with almost 14 million copies sold.
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