When you reach age 21 you are no longer an adult

From June 6 to July 11 the number 1 song on Billboard's adult contemporary chart was Taylor Swift's "Love Story." From July 18 through October 24 it was Miley Cyrus's "The Climb." From October 31 through December 26 (which hasn't happened yet, but Billboard can read palms), it was/is Taylor Swift's "You Belong With Me." To put this in perspective, number 1 right now on Radio Disney's Dot Com request line is Iyaz, who's 22 years old, making him a couple of years older than Taylor and five years older than Miley. Taylor, by the way, turned 20 last week; does this mean her reign as an adult contemporary queen may be in jeopardy?