Taylor Swift will release her third studio album, "Speak Now" -- the follow-up to 2008's "Fearless" -- on Oct. 25, the country star announced Tuesday (July 20). Swift shared the news with her fans on Ustream and said the album's first single, "Mine," will be released around mid-August.

"Ever since we put out 'Fearless' I've been writing this one," said Swift, who added that "Speak Now" will consist of about 14 songs. "Through the past two years, I've been through a lot of things that I have been dying to write about and talk about. There were a lot of things that I wanted to say in the moment but couldn't, and this album is my opportunity to do that.

Wearing a turquoise sundress and yellow headband with a glittery bow, Swift went into detail with her fans about the making of "Speak Now," which she wrote entirely on her own. "I didn't have any co-writers, and it didn't really happen on purpose," she explained. "I'd get my best ideas at 3 am in Arkansas when I didn't have any co-writers around, so I would just finish it." Swift said the same thing happened in New York, Boston and Nashville. "It just so happened that the songs that made the cut on the album were the ones I wrote myself, so, wish me luck!" she laughed.

The 21-year-old singer/songwriter co-produced "Speak Now" with longtime collaborator Nathan Chapman, who worked with her on "Fearless" and her 2006 self-titled debut.

Swift's "Fearless" album has sold 5.9 million copies in the U.S., according to Nielsen SoundScan, and was the best-selling album of 2009. Combined with her "Taylor Swift" debut as well as holiday albums and others, Swift has sold 11.7 million albums overall.