How tweet: Stars talking live to their fans What better way to show engagement with viewers than for actors to tweet with them during shows, as on ABC's 'Modern Family'   For CBS's 'NCIS,' yet another record Cop procedural, now in its ninth year and the long-reigning top drama on television, is airing its 200th episode this month   For NBC's 'Voice,' a hard act to follow Last year's surprise hit returned in the cushiest of timeslots, post-Super Bowl. Now it gets tough, competing on Mondays at 8.   Best tube bets this weekend Friday: Knicks vs. Celtics on ESPN; Saturday: Super Bowl Fan Jam on CMT; Sunday: Super Bowl and 'The Voice' on NBC   Aging yet still spry: 'Grey's Anatomy' ABC drama excels at the art of integrating new characters, and that's helped it hold a devoted audience after all these years   Ahead of Super Bowl, a peek at the ads CBS airs 'Super Bowl's Greatest Commercials 2012,' a look at great game ads of the past and some that will air Sunday   Celebrating Hollywood's leading man The timing could not be better, heading into the Oscars, for a sitdown with George Clooney on Bravo's 'Inside the Actors Studio'   On 'Gossip Girl,' a very grownup event Blair weds a prince wearing a Vera Wang dress, signaling a maturing of the signature CW show and the network   Best tube bets this weekend Friday: 'Chuck' series finale on NBC; Saturday: UFC on Fox; Sunday: SAG Awards on TNT   At last, fat chefs shedding the pounds Food Network comes up with a clever twist on weight loss shows, helping overweight cooks lose weight and eat better in 'Fat Chef' next >>