"Extra" caught up with the UK singer Katherine Jenkins and her partner Mark Ballas during a rehearsal to talk about last week's sexy salsa, and the performance they have brewing for Monday night's "DWTS."  

Their salsa in week 5 earned them 29 out of 30, putting them back on top of the competition.

When asked about how they've dealt with stress on the dance floor, the 31-year-old opera singer said, "About 15 minutes before we dance, I become a crazy person. He cannot believe how much I change."

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