Kylie Minogue showed Katie Couric how to the do the 'Locomotion' and now pretty much everyone is doing it and it's not so brand new.

All the cool kids (including Madison Hildebrand) were reading Andy's book, 'Most Talkative,' this summer.

Boldly going where no host has gone before.

Carole Radziwill and Jacqueline Laurita show that New York and Jersey aren't so different after all.

Denise Richards successfully seduced Andy with her lollipop skills on 'Turn Me Tuesday.'

Make it rain! Joe Manganiello showed off his 'Magic Mike' moves for Andy Cohen and Andrew Zimmern.

It was a total knock out when Mike Tyson and Melissa Gorga tried to fold clothes with boxing gloves on.

The clubhouse just hasn't been the same since Scissor Sisters came by to throw a kiki.

Look out, Zach Braff! Donald Faison has got a bromance blooming with Andy.

Smells like... royalty! Mark Feuerstein gave LuAnn de Lesseps a sniff when they joined Andy in the clubhouse.

Willie Geist got to live out his teenage fantasy when he slow-danced with Kelly Kapowski, er, Tiffani Thiessen.

The shotski: a Wednesday tradition since 2012. Here, Chris Colfer and Tamra Barney down one.

Things got a little surreal when Amy Sedaris and Bruce Jenner went elbow-deep into the Mazel ball sack during the special 'WWHL-ympics.'

Mmm, cake. Niecy Nash and Gretchen Rossi got a little messy when they went karat cake diving.

E.I.! Andy repped St. Louie proudly when he rocked Nelly's glasses.

'Mob Wives' meet 'Housewives': Teresa Giudice and Mob Wives Renee Graziano bonded when they appeared together on the show. Andy looks worried.

New York housewife Carole Radziwill stopped by to poke Jerry O'Connell with various objects.

The Queen of England was no match for Joan Rivers' caustic wit. As you can see, Andy and Rashida Jones were royally amused.

Sonja Morgan and Josh Flagg shared a moment on the night when booze was flying. Literally.

JWOWW gives James Frey a little Jersey Turnpike spanking.

USA! USA! Pauly D's hair shows off its patriotism.

You can't spell puppy love without Beth Stern, L.A. Reid, and Randall the Honey Badger. Actually, you can, but you know what we mean.

It was love at first slap when Meryl Streep stopped in to chat with Andy.