Frenemies might be a better term for these two. There's no denying the two women have been through a lot together. They've both done terrible things as villains, but they've also shown great love for their children. We'd love to see the ladies team up again.

We'll take any excuse to have Tinker Bell back on our screens. Her friendship with Regina brought out a softer side of the not quite evil queen. Things may have been strained once they were reunited, but Tinker Bell never shied away from giving Regina solid advice. She also believed a happy ending was possible.

Snow and Charming must give up their hearts to save Storybrooke on Once Upon a Time. "Heartless" is the seventh episode of the show's sixth season.

Hopefully we'll get to see Emma and Regina work together in order to save their son.

Not only is Regina grieving her lost love, but it sounds like Henry is about to get into trouble as well.

Regina grieves for Robin. We guess this is really the wrong time to ask about her outfit, but she looks amazing!

Regina takes drastic measures by going to Cora to fight Hades on Once Upon a Time. "Sisters" is the 19th episode of the show's fifth season.

Regina and Robin won't be happy when Zelena turns up in the Underworld on Once Upon a Time. "Our Decay" is the 16th episode of the show's fifth season.

A friend of Mary Margaret's helps the group search for Hook on Once Upon a Time. "Labor of Love" is the 13th episode of the show's fifth season.

Will the Evil Queen crash their party? As much as we love Regina and how far she's come, it's hard not to miss the Evil Queen's epic wardrobe.

Regina is forced to confront a visitor from her past on the return of Once Upon a Time.

Wouldn't it be interesting if Zelena was the person who actually helped them break in and retrieve Excalibur?