Dancing With the Stars: All Stars 2012 Finale - Live Performance Show Tonight; Watch Online Full Episodes

Dancing With the Stars Season 15 will unveil tonight who will win the mirrorball trophy. The show will air live on TV at 9 p.m. ET. Best moments of the finale event as well as full episodes of the season can also be watched online for free (see details below).

The final couples - Shawn Johnson and Derek Hough, Melissa Rycroft and Tony Dovolani, and Kelly Monaco and Val Chmerkovskiy – performed two dances Monday and they will have one more on Tuesday.

The ladies are excited about coming to the final show, saying that they have done all they can to win the competition.

"There is something liberating about going out there, putting it all on the dance floor and having it be out of your hands now. It feels really good," said Shawn Johnson, according to E! Online.

The Olympic gold medalist has been the favorite to win, according to the final poll of the season.

Johnson has captured the public's attention with her precision and high-flying acrobatic moves, which have been made her and Derek break some rules during the competition.

"This whole season we haven't been dancing for three people, we've been dancing for the viewers," Derek, her partner, has defended. "That was one of their favorite dances, so if that's what they want, that's what we're going to give them."

However, something that Johnson may have as a disadvantage is related to her performance factor, as she can come off as too mechanical and robotic at times, experts have pointed.

The gymnastic will compete against Kelly Monaco and Melissa Rycroft, who have also good chances to win the prize.

The Season 15 finale of Dancing With the Stars will air tonight, Tuesday, Nov. 27, at 9 p.m. ET on ABC.

Videos footage of the best moments of the season, as well as aired full episodes, can also be watched online for free on the ABC website here.