On Tuesday, the three remaining couples performed fusion dances that were chosen for them by their fellow contestants on Monday. Riley and Hough earned a perfect 30 out of 30 for their Samba and Quickstep fusion dance, giving them a total of 94 out of 95 points for both nights.
After her win, Riley confessed she had doubts she'd make it this far.
"It's a representation that you can do whatever it is you put your mind to, and I'm really proud of myself," said the 27-year-old "Glee" actress, holding her sparkling mirror ball trophy. "This is just like the cherry on top of a sundae for me. Me accomplishing all that I did every single week was my reward, and this is just something extra."
"A shiny, disco cherry," Hough added.
This marks Hough's fifth "Dancing With The Stars" victory. He previously won last season with partner Kellie Pickler, who performed in the ballroom during part 1 of the finale Monday night.
Bleu and partner Karina Smirnoff are this year's second-place finishers. They received 27 out of 30 points for their Cha Cha Cha and Foxtrot fusion dance Tuesday, giving them a total of 89 out of 95 points for both nights.
"I accomplished my goals, which was to make it to the end and to be able to show what Karina and I were capable of, and I've been saying this entire time it would've been great to own the mirror ball, but it's not what it's about for me," said Bleu.
Jack Osbourne and partner Cheryl Burke danced to what Osbourne called a third place victory -- also receiving 27 out of 30 from the judges for their Paso Doble and Salsa fusion dance.
"Listen, I went the distance. I saw this from start to finish. And the only thing is I don't go home with the mirror ball. To me, just coming in third and making it to the finals was winning enough," Osbourne said.
The finale also saw the return of eliminated contestants Keyshawn Johnson, Bill Nye, Valerie Harper, Christina Milian, Nicole "Snooki" Polizzi, Brant Daugherty, Elizabeth Berkley Lauren, Leah Remini and Bill Engvall.
"Jack was probably my heart-string pull because he and I started at the same place and he just really became a really good dancer," said Engvall, who was eliminated Monday night. "Amber powered through some rough times in the season. And Corbin, I mean, my God, he's just a hell of a dancer."
The show will be back for season 18 in March.