Taylor Swift comes in at No. 12 on Forbes' 100 most powerful celebrities list, released this week. The high ranking makes the 20-year-old superstar the top-rated country musician on this list, but not the youngest celeb. Taylor's buddy Miley Cyrus has that distinction, as the 17-year-old ranks just behind Taylor at No. 13.

Other youngsters on the list include the Jonas Brothers -- made up of Taylor's ex-boyfriend Joe, age 20, Miley's ex-boyfriend Nick, age 17, plus 22-year old Kevin. The pop princes rank No. 40 on Forbes' list.

The Forbes rankings are based on stars' pre-tax earnings and visibility on social and news media outlets, and includes musicians, actors and other celebrities. Taylor achieved her ranking based on her status as the "most-played" artist on the radio during 2009, her $54 million gross from concerts during the year, and record sales, including 3.2 million sales of her 'Fearless' album and 12 million downloads.