American Idol winner and pop-star Kelly Clarkson announced via Twitter Tuesday evening that she and her new husband are expecting their first child together. In a tweet, Clarkson wrote, "I'm pregnant!!! Brandon and I are so excited! Best early Christmas present ever." The 31-year-old singer married music manager Brandon Blackstock in October. Clarkson and Blackstock, the stepson of country singer Reba McEntire, dated two years before marrying. He has two children from a previous marriage. The pair have not said when their bundle of joy is due.