Niall Horan

After Jay Leno's second retirement from the program, Jimmy Fallon stepped in as his permanent replacement. After 42 years in Los Angeles the program was brought back to New York.

Seth Meyers, who is "Saturday Night Live's" longest serving anchor on the show's wildly popular "Weekend Update," takes over as host of NBC's "Late Night" — home to A-list celebrity guests, memorable comedy and the best in musical talent. As the Emmy Award-winning head writer for "SNL," Meyers has established a reputation for sharp wit and perfectly timed comedy, and has gained fame for his spot-on jokes and satire. Meyers takes his departure from "SNL" to his new post at "Late Night," as Jimmy Fallon moves to "The Tonight Show".

David Letterman uses mature humor to appeal to his audience in this weeknight series, which gets its music from a house band led by Paul Shaffer. Among the show's most-famous segments are the Top Ten List and Stupid Pet Tricks, the latter of which subsequently led to an additional recurring segment called Stupid Human Tricks.

Kelly Clarkson presents the biggest newsmakers and names in film, television and music; as well as emerging new talent and everyday people who are beacons of hope in their communities.

A late-night live television sketch comedy and variety show created by Lorne Michaels. The show's comedy sketches, which parody contemporary culture and politics, are performed by a large and varying cast of repertory and newer cast members. Each episode is hosted by a celebrity guest, who usually delivers an opening monologue and performs in sketches with the cast, and features performances by a musical guest.

Each week celebrity guests join Irish comedian Graham Norton to discuss what's being going on around the world that week. The guests poke fun and share their opinions on the main news stories. Graham is often joined by a band or artist to play the show out.

Once Craig Ferguson retires, James Corden will be taking over The Late Late Show. The show is a late night talk show that interviews celebrities and has its own bits. And of course, it's all hosted by James Corden.

Jimmy Kimmel Live! is an American late-night talk show, created and hosted by Jimmy Kimmel and broadcast on ABC.