The R&B singer whose real name is Mario Dewar Barrett, that is.

Karina Smirnoff is still quite happy with boyfriend Mario Lopez.

The Dancing With the Stars pro tells Us Weekly that "there is nothing" to rumors that she's hooking up with her current partner, R&B singer Mario.

"We have a completely professional relationship," Karina Smirnoff said. "I have a lot of respect for Mario. He is a great person."

The New York Post reported earlier this week that Mario and Karina Smirnoff (who partnered with Lopez on the show in season three) were "making out by the valet with their hands all over each other" at the Four Seasons Hotel.

Mario, who performed very well in each of the first two episodes of the current sixth season, also denies the claim, saying via his rep "this did not happen."

But a source close to the singer insists "there is definitely chemistry and flirtation between the two." Palpable, even, you could say. They're hot, hot, hot!

As with Drew Lachey and Cheryl Burke, that kind of connection is enough to make people assume there is some serious rolling in the hay going on.

That's Dancing With the Stars for you!

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.