Among the "guest stars" showcased in ConnecTV chat: Keegan Allen of ABC Family's "Pretty Little Liars, " Val Chmerkovskiy of ABC's "Dancing With The Stars: All-Stars, " Apollo Nida of Bravo's "Real Housewives of Atlanta, " Beilee Madison co-star of Billy Crystal's "Parental Guidance, " Chris Rene of Fox's "X-Factor, " Super Bowl XXXIV champion and St.

ENGADGET: ConnecTV adds SocialTV Timeline for mobile, puts chats with stars on a second screen