STAGE TUBE: Katherine Jenkins Injured During Last Night's DWTS

On last night's DANCING WITH THE STAR, contestant Katherine Jenkins appeared overcome with emotion at the conclusion of her dance with partner Mark Ballas. It remained unclear if the opera star was disappointed by her performance or crying out of pain. Ballas and host Tom Bergeron tried to console Jenkins who repeatedly told her partner, "I'm sorry, Mark."

Later on in the show, it appeared that Jenkins may have injured her back during the routine. She later tweeted to fans, "Thank you for all your concerned tweets... I'm with the Doctor, he says it was a reflectorical spasm in my lower back."

On tonight's results show, award winning Country superstar Carrie Underwood is set to perform "Good Girl," the first single off her brand new album, "Blown Away." Her performance will be accompanied by Tristan MacManus, Sharna Burgess, Henry Byalikov and Emma Slater. Multi-platinum, Grammy ® Award-winning artist Alanis Morissette will hit the stage with a world premiere performance of her new single, "Guardian," from her upcoming album, "Havoc and Bright Lights." Her performance will be accompanied by Blake McGrath and Tyne Stecklein.

During Tuesday night's results show we will also have an incredible performance from the upcoming Warner Bros Pictures feature release, "Rock of Ages." The electrifying performance will feature two-time former "Dancing with the Stars" champion Julianne Hough and her co-star, actor/singer Diego Boneta. Directed by Adam Shankman ("Hairspray"), New Line Cinema's adaptation of the smash hit Broadway musical "Rock of Ages" hit theaters June 15th. The movie musical stars Julianne Hough, Diego Boneta, Russell Brand, Paul Giamatti, Catherine Zeta-Jones, Malin Akerman, Mary J. Blige, Bryan Cranston, with Alec Baldwin and Tom Cruise.

View Jenkins dramatic fall during last night's performance below!