Music news from Ravinia, 'Llewyn Davis' & Johnny Mathis

Broadway star-turned-Disney-prince Jonathan Groff will sing at Ravinia this weekend. The entertainer, who has starred in the Tony-winning “Spring Awakening” and on TV’s “Glee” is celebrating the strong box office showing of “Frozen.” Groff is celebrating the important No. 2 place “Frozen” snared over the Thanksgiving weekend — going up against “The Hunger Games: Catching Fire” juggernaut.

He will make his Ravinia debut Saturday — with two back-to-back concerts in the Highland Park venue’s Bennett Gordon Hall.

†In the wake of the many recent commemorations of the 50^th anniversary of JFK’s assassination, “Please Mr. Kennedy,” a song from the upcoming Coen Brothers film, “Inside Llewyn Davis,” has been released on YouTube. Performed in the film by Justin Timberlake, Oscar Isaac and Adam Driver, the tune was penned by Timberlake, Joel and Ethan Coen, Ed Rush, George Cromarty and T. Bone Burnett.

†Legendary singer Johnny Mathis — who has just released his sixth holiday studio album, “Sending You A Little Christmas” — will be Kevin Moore’s guest on his WSBC radio show Sunday. The new Mathis album also features guest artists Billy Joel, Natalie Cole, Jim Brickman and Gloria Estefan.