Katie takes a look back at the year in our show “2012: The Year That Was.” Kate Aronwitz of Facebook tells Katie how the social network calculated what we loved most in 2012, while newsman Luke Russert discusses the top news events of the year.

A panel of comedians count down the top TV shows, movies and more.

The oh-so-charming (and sexy!) Hugh Jackman talks “Les Miserables,” his lasting marriage and his childhood.

Katie and Hugh go head-to-head in “Sing That Show Tune!”

Co-stars in “The Impossible,” Naomi Watts and Ewan McGregor, talk about the emotional roles they play as parents of a family swept away by the 2004 tsunami in Thailand.

Hollywood comedic legends, Billy Crystal and Bette Midler, chat about their own parenting tactics and their roles in “Parental Guidance.”

Taylor Swift talks ex-boyfriends, the inspiration for her music, her acceptance speech reactions and her massive fanbase.

Music and film icon, Barbra Streisand, reveals the secret to her marriage with James Brolin, her dream duet partner and the moment she knew she had those golden pipes.

After a whirlwind rise to fame, author E L James joins Katie for her first major interview since “50 Shades of Grey” captivated women across the globe.

Supermodel Heidi Klum opens up for the first time since her very public divorce from singer Seal.

The ever inspiring, talented and brave Michael J Fox embraces Katie as he comes on to discuss his struggles – and triumphs – living with Parkinson’s disease.

That’s our boss! Katie has an impromptu headstand competition with Olympic Champion Mary Lou Retton.

Singer-songwriter Demi Lovato performs after speaking candidly about her battle with an eating disorder. She hopes to inspire young girls to believe in themselves.

Sheryl Crow and Jessica Simpson helped kick off “Katie” with a bang on September 10th!

Funny girl Chelsea Handler gets candid about her personal life and chlidhood years before taking Katie’s seat for a reverse interview. That’s right, Chelsea got a shot at asking the questions.

Musical diva, actress, entrepreneur, philanthropist and film producer, Jennifer Lopez, joins Katie to chat about reinventing herself time and again.

The pint-sized stars from hit reality show “Dance Moms” get all dolled up and show off their best dance moves.

Katie gets country and learns a little twang from the rural reality stars of “Gold Rush.”

The outrageous cast of characters from MTV’s reality show “Jersey Shore” give Katie their uncensored opinions and recount the show’s most memorable moments.

Outstanding does not begin to explain the talent this five member a cappella group shares in their cover performances. The Pentatonix perform for us in the “Katie” studio.

The amazingly brave 24-year-old Aimee Copeland walks on stage, unassisted, to tell her extraordinary story of survival after beating a flesh-eating bacteria.

In a heartbreaking conversation with Katie, the parents of FAMU hazing victim, Robert Champion, remember their deceased son and pledge to fight the rampant issue of hazing in schools across America.

Psychologist Dr. Jennifer Hartstein and ABC News contributor Dan Abrams weigh in on bullying, an issue that’s swept our country and put our youth at risk.

Dogs! Dogs! And more dogs! Katie makes a grand entrance on stage to introduce the dog show, with many dogs in tow!

From rescue dogs to canine models to pups seeking adoption, Katie covers all bases in our dog show, even the world of pet psychics!

Pedigree generously donates $100,000 to a shelter, Bobbi & the Strays, and we meet six of their dogs who desperately need homes.

The funny, fearless and fabulous Sofia Vergara has the audience in fits of laughter with her wild stories and defining accent.

Who needs a couch when there’s a ping pong table? Katie and Susan Sarandon dust off their paddles for a friendly (and competitive!) game right there on the “Katie” stage.

In a moving show that had us all asking, “Is there a heaven?” a young boy, Colton Burpo, details his miraculous journey to heaven and back.

At 86, Tony Bennett soothes us with that legendary voice.

Sex, drugs and rock ‘n’ roll! Katie asks Rod Stewart about it all and one brave fan hops on stage to serenade the rock star.

The Barefoot Contessa Ina Garten lets us in on her secret to making a perfect Maple Pecan Pie.

The lovely orphans of the Broadway musical “Annie” perform on stage and tell Katie about life as young Broadway stars.

Alicia Keys is on fire as she sings her heart out from her new album “Girl on Fire.”

Power woman and Facebook COO Sheryl Sandberg announces a milestone for the social network on “Katie” – Facebook’s one billionth friend.

Actor Steve Buscemi and music legend Jon Bon Jovi talk about Hurricane Sandy’s destruction of their hometowns and encourage others to join in the effort to support those grieving in affected communities.

As Hurricane Sandy battered the northeast, ABC News Chief Meteorologist Sam Champion and News Anchor Josh Elliott share their insights from being in the field.

As America watched the unimaginable suffering of one Connecticut community this December, Katie lends her support to the families of Newtown at an evening vigil.

English singer-songwriter Ed Sheeran tells Katie how he’s topped the charts in the UK, performed for the Queen and is now collaborating with Taylor Swift.

Ed Sheeran performs on “Katie” and discusses his new duet with megastar, Taylor Swift.

The ladies of the audience pose with Ed Sheeran for a quick photo.

The ever-young Jane Fonda poses with Katie after the show.

The hilarious duo, Kelly Ripa and Michael Strahan of “LIVE with Kelly and Michael,” tells Katie about the joys of being co-hosts and still finding time for their families.

Dr. Sanjay Gupta reveals his shocking investigation into the dangers of misusing prescription drugs. Here he is demonstrating common, though deadly, drug combinations.

After surviving a plane propeller accident, fashion-blogger Lauren Scruggs shows Katie her prosthetic hand and talks about how she is coping.

Lauren Scruggs and her parents share a brighter moment on “Katie” as Lauren tells her amazing story of survival.

The ex-wife of the DC sniper, Mildred Muhammad, shares her terrifying journey of being married to a murderer and how she eventually got out.

Psychic mediums Char Margolis and John Edward read our audience and answer the skeptics, including Katie.

Dancing and dazzling, the Radio City Rockettes join Katie for the grand giveaway show where audience members receive holiday gifts galore!

Celebrity stylist Carson Kressley keeps us cracking up as he holds a tablet to his ear as a phone.

Yes, that is an edible “Katie” logo made out of cupcakes by Melissa Ben-Ishay’s company, Baked By Melissa. She is just one of the women we featured in our “Women Who Made Millions with a Simple Idea” show.

Alli Webb, founder of Drybar, used to blow dry her friends hair for a little extra cash. Now that simple idea has made her millions.