Dancing with the Stars: Katherine Jenkins & Mark Ballas's Postcards from LondonThe pair take a break from rehearsals that have left Jenkins "aching in places I didn't know it was possible to ache in"

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LONDON CALLING

Dancing with the Stars pro Mark Ballas is across the pond to rehearse – and see sights like Big Ben! – with his celebrity partner, singer Katherine Jenkins. "She is working so hard and I can't wait for everyone to watch her dance," says Ballas, who will hit the ballroom with Jenkins and 10 other couples on March 19.