Fans were treated to a trio of perfect scores tonight. That's what happens when the final four couples step into the spotlight. Here's a recap each duo's routines and scores...

Melissa Rycroft and Tony Dovolani, Quickstep: Len thought the musicality was great and her feet were improved. He thought it was gorgeous. Bruno thought it was good, but he wanted to be exhilarated; it didn't drive him wild. Carrie Ann agrees with Bruno; she thought the dance didn't have soul. She also points out a little bit of space in the hold. Len groans beside her. Score: 28 (9, 10, 9)

Gilles Marini and Cheryl Burke, Waltz: Bruno gets up and screams out random positive words. Carrie Ann thought it was a breathtaking fantasy. Len gives them a sitting down standing ovation; he must be too old to get up. Score: 30 (10, 10, 10)

Shawn Johnson and Mark Ballas, Argentine Tango: Carrie Ann knows that she's the youngest contestant, but she delivered with the passion and precision. Len loves this semi-final. He loved the maturity and seriousness; it was her best performance. Bruno compared the dance to the tango in the film Chicago. Somewhere in his jumble of words there were positive remarks. Score: 30 (10, 10, 10).

Ty Murray and Chelsie Hightower, Viennese Waltz: Len knows how hard Ty has worked. There were a few little things wrong, but it was fabulous. Bruno understands why America loves him, but the dance was not fluid. Len disagrees. Carrie Ann loves that he gets a lot of support; she knows there was some wobbles and struggle. It turns out that Carrie Ann was that shush girl in elementary school. Score: 25 (8, 9, 8)

Melissa Rycroft and Tony Dovolani, Cha-Cha: Bruno thought it was inconsistent; she lacked the energy throughout the whole dance. Carrie Ann appreciated the emotional attachment, but she thought her steps where everywhere. The dance wasn't up to the standard of her samba, according to Len. Score: 27 (9, 9, 9)

Gilles Marini and Cheryl Burke, Salsa: Carrie Ann gets up and screams in excitement. She wants to see Gilles next week. Len is speechless and wishes that there was an 11 paddle. Bruno thinks that Gilles has Lil Kim in his booty. Bruno agrees that he deserves to be in the final. Score: 30 (10, 10, 10)

Shawn Johnson and Mark Ballas, Jive: Len first thanks the band. He thought it was fast and fun, but there wasn't enough quality in the dance. Bruno loves her wild nature, but knew that it had Lindy Hop elements. Carrie Ann thought she got heavier as she danced by the end of the performance. Scores: 26 (9, 8, 9)

Ty Murray and Chelsie Hightower, Samba: Bruno loves the resilience and determination. He thought that Ty was dancing on a tightrope. He lost his footing but it was great footwork. Carrie Ann thinks he's the MVP of the season. Len knows that his Latin section is bad, but Chelise has worked a lot of magic. Score: 23 (8, 7, 8)