Karina Smirnoff trusts her boyfriend Mario Lopez and doesn't listen to gossip that he's cheating.

"The only rumor I saw was in a magazine where it said [Mario] was seen with [a woman] who was actually just at the same place at the same time," Smirnoff told Usmagazine.com. "He doesn't even know who the lady is!"

"My instinct is that, unless there is something that I don't know, it's all BS and it's not true," she added.

As for rumors that the Dancing With the Stars pro – who was voted off May 6 – didn't get along with her partner R&B singer Mario?

"I don't think we ever fought!" Smirnoff said. "We only had one disagreement once about the schedule early in the show, because I said, 'You really need to put in as much time as you can. You can't go off and promote your CD as much as you used to while you're on the show.'"

Now off DWTS, Smirnoff plans to spend her time off in NYC supporting Lopez's Broadway debut in Chorus Line.

"Mario is doing an amazing job!" Smirnoff raved to Us. "As soon as the show is over, he's going to take a few weeks off to go on a small tour for his fitness book and I'm going with him."