VIDEO: Amber Riley: 'I'm In It to Win It' on DANCING WITH THE STARS

On last night's DANCING WITH THE STARS, the remaining contestants were challenged to perform two full dances, including the Trio Dance. Looking back on her experience with the show thus far, Amber Riley reflected, "My confidence has soared and I think I'll carry that with me for the rest of my life."

However a serious knee injury threatened to jeopardize the Glee star along with her partner Derek Hough during their Quick Step performance.

Following the dance, Len offered, "I realize that you are handling an injury, however, choreography is like make-up, it can only cover certain blemishes." He added, "You were a little loose in your top line tonight. It got a little wild and it needed to be a little bit cleaner."

Agreed Bruno, "Your performance is always full on - your presence is dazzling. However, don't lean forward - you have to lean back."

Said Carrie Ann, "The good news is, you have set the standard in this competition so very high. But now you have to live up to your own standard."

The couple received 24 out of 30 points.

For the trio dance, pro dancer Mark Ballas joined Amber and Derek. "She's a quick study and works really hard," praised Ballas during rehearsal week. JokEd Riley of her sexy partners, "There are definitely some women out there who would kill to dance with Mark and Derek!"

Following the performance, Len commented, "You were like a ray of sunshine on a gloomy day - great dance!"

Added Bruno, You can let it rip! You're just irresistible!"

Said Carrie Ann, "You guys are like the 'Dream Team'. That was just insane."

After Being asked if she was concerned about her knee injuries, by Carrie Ann, Riley declared confidently, "I'm in it to win it - I'm not a quitter!"

The couple received a 27 out of 30 for a total of 51 points for the night. They will move on to next week's semi-final round of the competition!