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Maksim Chmerkovskiy and Karina Smirnoff may have looked fab onstage, but things weren't quite in step behind the scenes.
An insider reports the ex-couple exchanged some heated words before and after their performance.
"They were going at it, screaming at each other," an eyewitness tells me. "He said she was taking too long in hair and makeup. It got kind of loud."
Backstage at the Lipton Green Vitali Tea gift lounge, questions about the breakup were off-limits, but Karina said she couldn't be happier with their dance routine...