Kristin Chenoweth, Josh Groban, and Eva Longoria add a touch of music to the night. Kathy presides over a gay vow renewal.

Darren Criss, Lily Tomlin, and Jesse Tyler Ferguson bring the laughs to the KATHY show. Kathy presents the conclusion of Law & Order: KGU.

Megan Mullally, Nick Offerman, and Michelle Trachtenberg light up Kathy's couch. Kathy presents Law & Order: KGU Part 1.

Jaime Pressly, Pauley Perrette, and Kunal Nayyar sit down with Kathy. Kathy's audience takes a stab at guessing mystery objects.

Margaret Cho, Johnny Weir, and Carmen Electra turn up the heat on Kathy's couch. Kathy's staff goes through team building exercises.

Kate Walsh, Steven Weber, and Aubrey Plaza visit the Kathy show. Kathy also runs her own dog rescue program called Kathy's Kompassionate Kanines.

Russell Brand, A$AP Rocky, and Danny Brown turn up the antics on Kathy's couch. Meanwhile, Kathy takes her mother to a sex shop.

Larry King and Craig Ferguson school Kathy on how to run a talk show. Music group YLA make a surprise appearance.

Chris Colfer, Kelly Osbourne and Lisa Ling join Kathy on her couch. Kathy also realizes she is 52 and pregnant.

Chelsea Handler and Chris Noth sit down with Kathy. Kathy and her assistant, Tiffany, try to buy things on Craigslist.

Rapper T.I. gets Kathy all to himself before being joined by others. Kathy and her mother Maggie visit a psychic.

Lisa Kudrow and Jane Lynch headline the start of the second season. Kathy tortures her staff and welcomes the "new fish."