LOS ANGELES, Dec 17: Kelly Clarkson, who became the first contestant to win “American Idol” a decade ago and went on to several chart-topping successes, has gotten engaged to her boyfriend, the singer said in a Twitter message on Saturday. Clarkson, 30, previously revealed she had been dating talent manager Brandon Blackstock since early this year. Blackstock is the stepson of country singer Reba McEntire. (agencies)