Menzel, who won the Tony Award for Wicked, was also Tony-nominated for her performance in Rent and will star in the upcoming Broadway musical If/Then.

Groff, who was Tony-nominated for his performance in Spring Awakening, has also been seen on Broadway in In My Life and will star in the upcoming HBO series "Looking."

Bell has appeared on Broadway in The Crucible and The Adventures of Tom Sawyer. She has been seen on TV in "Veronica Mars" and "Parks and Recreation," among others.

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Highlights from "Frozen":

Idina Menzel and Kristen Bell voicing a scene from "Frozen":

"Let It Go" – Idina Menzel:

"Fame" – Kirsten Bell:

"One Way or Another" – Kristen Bell:

Idina Menzel sings "Defying Gravity" on "The Late Show":

"The Wizard and I" - Idina Menzel:

Idina Menzel and Wicked co-star Kristin Chenoweth rehearsing "For Good":

Idina Menzel's music video of "Brave":

Idina Menzel's music video of "I Stand":

"Defying Gravity" at Menzel's Barefoot at the Symphony:

"Tomorrow" at Menzel's Barefoot at the Symphony:

Menzel covering Lady Gaga's "Poker Face":

Menzel sings "Don't Rain on My Parade" at the Kennedy Center Honors:

"What I Did For Love" from A Chorus Line:

Menzel and Fredi Walker perform "Take Me Or Leave Me" from Rent:

Menzel and Tracie Thoms perform "Take Me Or Leave Me" in the "Rent" film:

Jonathan Groff performs "If Mama Was Married" with Christian Borle and "Let Me Be Your Star" with Jeremy Jordan:

Groff performs "Anything Goes":

Continued...

Groff and Spring Awakening co-star Lea Michele singing "I'll Be Home for Christmas."

Groff's cover of "A Case of You" by Joni Mitchell at a Joe's Pub performance.

Playbill Video's "Obsessed!" with Groff. Part One:

Part Two:

Here are highlights from Groff's solo concert in Indianapolis. "The Life of the Party" from Andrew Lippa's The Wild Party:

"Moving Too Fast" from The Last Five Years:

"Everybody's Talking" by Harry Nilsson:

"(Ain't That) Good News" by Sam Cooke:

"Amish Paradise" by Weird Al Yankovic (by way of Coolio):

"Thank You for the Music" by ABBA:

"I Got Lost in His Arms" from Annie Get Your Gun:

"Moon River" by Henry Mancini/Johnny Mercer:

"The Lonely Goatherd" from The Sound of Music:

"Dividing Day" from The Light in the Piazza:

Groff impersonating Spring Awakening co-star Lea Michele:

Talking about his Spring Awakening audition:

"Left Behind" from Spring Awakening:

Talking about forgetting the words to "Left Behind":