Debby Ryan wore:

Jacket:  Stella McCartney

Cords: J Brand

Tee:  LNA

Shoes:  Jerome Rousseau

Cuff:  Dannijo

Clutch:  Camille Zarsky

Nails by Nails Inc. London

She was styled by Chris Horan.

Andy Samberg wore Burberry.

Bryan Cranston wore Burberry.

Chris O'Donnell wore a tux from Giorgio Armani and the shoes were from Cole Haan.  His cufflinks were from Martin Katz.  He was styled Wendi & Nicole.

Desmond Harrington wore Calvin Klein Collection.

Gabriel Byrne wore Calvin Klein Collection.

Hugh Laurie wore Burberry.

Hunter Parrish wore a one-button Dior suit and Marc Jacobs shoes.  He is styled by Chris Horan.

Jack McBrayer wore Calvin Klein Collection.

Jamie Kennedy wore a tux from Reiss and was styled by Dorothy Amos.

Jason Siegel wore John Varvatos.

Jeremy Piven wore Dolce & Gabbana, with shoes from Tom Ford.

Jerry Ferrara wore Hugo Boss.

John Slattery wore Calvin Klein Collection.

Jim Parsons wore Calvin Klein Collection.

Jimmy Fallon wore Tom Ford.

Jon Cryer wore Moschino Uomo.

Justin Timberlake wore William Rast with Dior shoes.  He was styled by Annie Psaltiras.

Kevin Bacon wore John Varvatos.

Kevin Connolly wore D&G.

Kevin Dillon wore Hugo Boss.

Kyle MacLachlan wore Hugo Boss.

Michael J. Fox wore Calvin Klein Collection.

Michael C. Hall wore Calvin Klein Collection.

Neil Patrick Harris wore Dolce & Gabbana.

Omar Epps wore Burberry.

Rainn Wilson wore Burberry.

Rex Lee wore a Brooks Brothers tux and platinum, diamond and sapphire cufflinks and shirt studs from Jacob & Co.

Ryan Seacrest wore Burberry.

Stephen Colbert wore Brooks Brothers.

Stephen Moyer wore Dolce & Gabbana.

Todd Holland wore Hugo Boss.

Tony Shaloub wore Hugo Boss.