Allison Janney/Alicia Keys

She's back! The last time ALLISON JANNEY (""The West Wing"") was here, she beat Ellen in a ping-pong match. What will their challenge be this time? Five-time Grammy winner ALICIA KEYS performs her new single ""Karma,"" from her CD, ""The Diary Of Alicia Keys."" And, Ellen's first ""Roving Reporter,"" Tony Synder is our ""Luxury Box.""