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Robert Herjavec and Kym Johnson brought the emotion to the Dancing With the Stars dance floor. The Shark Tank star and his pro dancer did the rumba to Ellie Goulding's "How Long Will I Love You" and there were some waterworks after the fact.

"I felt it, I felt it. I thought it was beautiful, I really did. Once we rehearsed it—the idea of somebody like me, after six weeks, being able to perform something that beautiful with someone this beautiful, it just takes my breath away," Robert told us. "Dance is so beautiful and I'm just so in awe of what she's been able to get me to do and so grateful."

Kym, who has won the show twice with partners Donny Osmond and Hines Ward, said she's never had a student who "genuinely loves learning how to dance as much as Robert does."

"It blows my mind," she said.

The duo scored a 29 from the judges. Not the worst score, but not the best either. This week, Robert had the support of some of his fellow Shark Tank stars in the audience.

"I think they now find me the ‘Sexy Shark,'" he joked. "It's not a high bar on Shark Tank."

Click play on the video above for more from Robert and Kym. Spoiler alert: They can't stop gushing about one another.

Dancing With the Stars airs Mondays, 8 p.m. on ABC.