Robin Williams, Whoopi Goldberg Added to Kelly Clarkson's NBC Christmas Special

The 'Crazy Ones' star and the 'View' moderator join Blake Shelton, Reba McEntire, Heidi Klum and Jay Leno who are set to appear in 'Kelly Clarkson's Cautionary Christmas Music Tale'.

More celebrities will lend their star power to Kelly Clarkson's Christmas special on NBC. Robin Williams, Whoopi Goldberg as well as William Shatner have just been added to the cast line-up of "Kelly Clarkson's Cautionary Christmas Music Tale".

Country stars Blake Shelton, Reba McEntire and Trisha Yearwood as well as Danica Patrick, Heidi Klum, Jay Leno, Matt Lauer, Ken Jeong and Jai Rodriguez are also set to appear in the comedic musical slated to air on Wednesday, December 11 at 10 P.M. EST.

The story follows Clarkson as she schemes to boost her popularity with a holiday special but ends up learning an important lesson. The special will feature songs from the "American Idol" first season winner's recently released Christmas album, "Wrapped in Red".

The newlywed singer is currently pregnant with her and husband Brandon Blackstock's first child together. The couple tied the knot on October 20 at Blackberry Farm in Walland, Tenn. in a simple and intimate ceremony attended by Blackstock's two kids from a previous marriage.