LOS ANGELES (Reuters) - Country singer and "American Idol" winner Carrie Underwood continued her reign on the Billboard 200 album chart on Wednesday, while British songstress Adele climbed back to No. 2 after 64 weeks on the chart with "21." Underwood's fourth studio album "Blown Away" sold 119,000 copies this week, down from the 267,000 sales debut last week, but enough to keep her No. 1 position on the chart. Grammy-winner Adele's "21" shows no sign of slowing down, selling 101,000 copies over the past week, bringing total sales of the album in the U.S. to more than 9 million. ...