Katherine Jenkins Injures Back During Emotional Night on 'Dancing With the Stars'

With a week to go before a winner is crowned on "Dancing With the Stars," Monday night's episode was an emotional one and it included an injury that could impact the outcome of the competition.

Katherine Jenkins, a standout since early in the season, seemed to lose her footing at the end of her second dance, a salsa routine, then burst into tears. While the trip up didn't drastically impact her scores — she and Mark Ballas got three nines – she was immediately taken to get "medical attention" when the show was over.

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Later, Jenkins shared an update with her Twitter followers, writing: "Thank you for all your concerned tweets... I'm with the Doctor, he says it was a reflectorical spasm in my lower back." Her partner, Mark Ballas, telling E!, "I watched it back and it looks like it was a mixture of her foot slip and her back kind of tweaked when she tried to fix it and I was in the air when this happened. So it's like being in a butterfly vertical over your partner and you see terror in her face. Time stood still for a second and I had to find a way to get underneath her and stand her back up. It's scary when those things happen."

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Meanwhile, Maria Menounos also had an emotional outburst of her own. During the rehearsals, Menounos gave her partner Derek Hough a pep talk when he was having a hard time coming up with another fresh routine. So after they finished the performance, she was very emotional with tears in her eyes and a shaky voice. But when they nabbed a perfect score for their dancing, Menounos was so excited she climbed up on a bench and started shrieking: "Oh my god!" Hough laughed as she did it and host Tom Bergeron joked: "I think Maria almost ripped apart the sky box! That would have been bad."

For the night, Hough and Menounos had the best score with 59/60, followed by William Levy and Cheryl Burke 58/60 (who also pulled in a perfect score), Donald Driver and Peta Murgotroyd 57/60 and Jenkins and Ballas trailing behind with 56/60.The finale airs May 22.