The Headlines segment in the "Tonight Show" took headlines from all over the world and intentionally incorporated a misspelled word, a juxtaposed image, a double entendre or badly structured sentences to comically and completely change what the writer is trying to say. It was aired weekly when Jay Leno was the host of the "Tonight Show."
The newspaper headlines were submitted by viewers all over the world. Leno would then point out the flubs and blunders of journalists and headline writers. The segment was usually run on Tuesday nights.
David Letterman has jocularly hinted that he came up with the concept of Headlines before Jay Leno in a segment in his show called Small Town News. Small Town News was aired since the early 1980s on "The David Letterman Show," "Late Night with David Letterman" and "Late Show with David Letterman."
Headlines was also parodied by Conan O'Brien in "Late Night with Conan O'Brien." He used a segment called Actual Items which uses purposefully altered advertisements specifically targeted to the show's prop and writing staffs.
As of 2015, the current host of the "Tonight Show," Jimmy Fallon has an updated version of the sketch called Screen Grabs. It uses comical photos from online media to entertain the viewers.