Jonathan Groff (Jesse St. James - 14 episodes)
Idina Menzel (Shelby Corcoran - 12 episodes)
Whoopi Goldberg (Carmen Tibideaux - 6 episodes)
Kristin Chenoweth (April Rhodes - 5 episodes)
Gwyneth Paltrow (Holly Holliday - 5 episodes)
Other notable special guest stars include:
Kate Hudson, John Stamos,
Demi Lovato, Peter Facinelli, Sarah Jessica Parker,
Brian Stokes Mitchell, Cheyenne Jackson, Jeff Goldblum,
Gloria Estefan, Shirley MacLaine, Molly Shannon, Josh
Groban, Eve, Carol Burnett, Barry Bostwick, Billy Dee
Williams, Britney Spears, Carrot Top, John Michael
Higgins, June Squibb, Katey Sagal, Kathy Griffin, Katie
Couric, Lindsay Lohan, Loretta Devine, Matt Bomer, Meat
Loaf, Neil Patrick Harris, Rex Lee, Ricky Martin, Tim
Conway, Tyra Banks, Olivia Newton-John, Helen Mirren, James Lipton, Joanna Rohrback, Marlee Martin,
Patti LuPone, and Perez Hilton.