"He's always encouraging me and making sure that I remember the stuff he's telling me. He's like, 'You're great. Just give them the sass. You know you got it,'" Riley said of her partner Derek Hough.
There was a two-way tie for second place, with triple eights for Corbin Bleu and Elizabeth Berkley Lauren.
"We have a lot of hard work to do but we're really excited," said Berkley Lauren.
Bleu said everybody has something to bring to the table this season.
Tied for fourth place were reality stars Jack Osbourne and Nicole "Snooki" Polizzi.
"It's like going over a cliff, like white water rafting. It's like once you go, there's no turning back so you better just hold on and go for the ride," said Osbourne.
Polizzi said she is relieved the first dance is over.
"I don't think I breathed the whole dance, so it was nice to just get it over and I did it good. I can't wait for next week now," she said.
Tied for sixth place with 22 points were Brant Daugherty and Christina Milian.
"I feel really good about what we did and she really made me confident over the last couple of weeks," Daugherty said of his partner, Peta Murgatroyd.
Two comedy veterans tied for eighth place: Valerie Harper and Leah Remini.
"Most of the day is spent dancing and then soaking your body because you're in pain. And then you crawl into bed and then you do it the next day, and I love it," said Remini.
So does Harper, who feels energized by all the support from fans.
"I mean, I really feel connected to those people throwing out all that love," said Harper.
The bottom three this week: Bill Engvall, Keyshawn Johnson and Bill Nye.
"I had a blast on it. I had a great time. It's the coolest thing," said Nye.
Everyone gets to dance again next Monday, but one team will also go home.