Country superstar Carrie Underwood's latest album, "Blown Away," held the top spot on the Billboard 200 albums chart this week, selling another 120,000 copies to edge out Adele's "21," which moved from No. 4 to No. 2 with a surge of Mothers Day sales.  "Blown Away" is Underwood's third No. 1 album, but the first to spend more than a week at the top.  Below is a clip of Underwood performing "Good Girl," the lead single from the album, on David Letterman.