Carrie Underwood makes an emotional 'American Idol' judging debut while John Legend faces tough choices on 'The Voice' during battle rounds.

Hear Serj Tankian's new solo song, "Justice Will Shine On," from his upcoming 'Foundations' EP.

With "We All Shine On: John, Yoko & Me," author and publicist Elliot Mintz fashions a heartbreaking portrait of Lennon’s life and times beyond the recording studio.