Former judge Julianne Hough is returning to "Dancing With the Stars" for one night only. She announced on Instagram on Monday, November 13 that she will be in the ballroom on Monday, November 20 to judge the final four couples who are remaining. Not only is she coming back to judge, but she also promised to give the audience and viewers a surprise.

The surprise

After hearing the news, fans are beginning to speculate what the surprise might be. Some are guessing that she might announce she will return as a regular judge next season. Some think she might return as a professional dancer.

After all, she did win two Mirrorball trophies as a dance coach. Some people think she might even announce a pregnancy since she and NHL star Brooks Laich got married in an outdoor ceremony in Idaho on July 8. Whatever the surprise is, she teased fans by saying it is a very meaningful one.

Couples remaining

After the shocking elimination of Victoria Arlen and Val Chmerkovskiy, four couples are left to be in the Season 25 finale. Hough will join regular judges Len Goodman, Carrie Ann Inaba, and Bruno Tonioli. She is no stranger to the judges' table because she has had that assignment since September 2014.

All the judges have something particular they look for in the dancers. Head judge Goodman doesn't like props, and he complains when dancers break their holds.

Inaba has a keen eye for seeing if the women do an unofficial lift with both feet off the floor. Tonioli looks for lots of movement. He seems to be the easiest to please.

Julianne will help judge frontrunners, Jordan Fisher and Lindsay Arnold, along with Drew Scott and Emma Slater, Linsey Stirling and Mark Ballas, and Frankie Muniz and Witney Carson.

Some think it would be nice to see Julianne for the first time as a married woman, but there is something to consider about her return.

Unless the former judge has been watching the show from home all season, she doesn't have a relationship with the remaining couples. She wouldn't know how they have improved during the season.

The finale doesn't seem to be an ideal time for her to come in at the end to judge the top contenders. Her extra scores could be the deciding factor in determining who the winner will be.

Perhaps it would have been more appropriate at some other time. The producers probably know what they are doing, but die-hard fans of the show don't think it is fair to the contestants. From previous seasons, Julianne has judged some of the dancers harshly.

Watch the two-night finale on "Dancing With The Stars" on Monday, November 20 and Tuesday, November 21 at 8 PM to welcome Julianne Hough and to see who will be eliminated.