For one of the group dates this week, Viall and a handful of bachelorettes learned the choreography for a dance to ultimately perform onstage with the Backstreet Boys at one of their shows near Los Angeles.
Corinne Olympios complained to the cameras she has no dancing skills at all, while Jasmine Goode felt confident in her talent being a professional dancer for the NBA.
"I could tell at the time Corinne was a little uncomfortable, but I knew she had the confidence to pull through. Not to brag, but by the time we hit the stage, we could have easily been confused as legit backup dancers. Jasmine was a natural and owned that stage," Viall wrote in his People blog.
Viall said Taylor Nolan "really let loose" and "show off some serious talent," but one girl really shined, and it was Lombard.
"I have to agree with the Backstreet Boys that Danielle L. had brought the heat," Viall said.
The Backstreet Boys picked Lombard as the best dancer of the night, so she was afforded the chance to dance alone with Viall onstage in front of everyone as the boy band serenaded them a love song.
"It was cool to share that surreal moment with Danielle, and it's something I don't think she or I will ever forget," Viall noted.
"Heading into the after party, I wanted to continue the high I felt with Danielle. Danielle was someone I'd had instant chemistry with from the night we met, and I felt like this was a date that brought us even closer."
As shown on Monday night's episode, Viall and Lombard engaged in a steamy and passionate kiss during a conversation they were having about their obvious connection.
"I felt natural around her, like we just fit. Giving Danielle the group-date rose was easy. I wanted her to know that she not only blew me away on this date, but I could really start to see a future with her," Viall revealed of the 27-year-old small business owner from Los Angeles.
"As corny as it sounds, she gave me butterflies -- and I'm man enough to admit it."