April 12, 2011 1:42 pm “Welcome Back, Kotter” Cast Belts Out Theme Song John Travolta and other members of the ’70s sitcom also talk about their best memories from the show’s run. US & World Videos 1:37 Pro-Palestinian protesters gather outside White House correspondents' dinner 2:05 How ‘Love Is Blind' made Vanessa Lachey and Nick Lachey's marriage stronger 5:49 Kelly Clarkson hilariously attempts handmade pasta with chef Evan Funke 1:59 Ellen DeGeneres jokes about being ‘kicked out of show business' 1:36 O.J. Simpson's cause of death revealed