Plot: Sugarland heads over to appear and perform in the Sesame Street program, and Insider goes after them, as they sing along with Elmo. Jack Ingram poses for a photoshoot of Country Weekly; Insider goes behind the scenes on Dierks Bentley's first show of his new tour, and profiles his opening act, the Randy Rogers Band; Alison Krauss helps the Santa Train pass out presents around Appalachia