 Complete the following phrase:  Singer-songwriter Taylor Swift released her third studio album Speak Now in October 2010. She wrote the album entirely by herself, as a statement to her critics that she was a capable songwriter. Co-produced by Swift and her longtime collaborator Nathan Chapman, the album musically expands on her characteristic country pop sound, with increasing elements of radio-friendly pop crossover, which had been evident on its predecessor Fearless 2008. It incorporates various rock styles, including pop rock and bluegrass. Speak Now was the fastest-selling digital album by a female artist, with 278,000 downloads in a week, earning Swift an entry in the 2010 Guinness World Records. At the 