Taylor Swift is slated to guest star on the May 14 Season 4 finale of "New Girl," which could find one of the show's core couples cast into a "cliffhanging love triangle."

According to E! News, either Jess and Nick or Cece and Schmidt will find themselves with major decisions to make about the status of their relationship. The website adds former "Teen Wolf" star Dylan O'Brien is slated to appear on coming episodes as a "blast from Jess' past" and Merritt Wever of "Nurse Jackie" fame is slated to play the role as Schmidt's ex-girlfriend.

Entitled "Clean Break," Swift's role in Season 4's Episode 22 is rumored to figure into how the respective romances will play out. All Jess and Nick's possibly rekindled romance comes just an episode or so after Spoilers Guide reports she branded herself a "love doctor."

Meanwhile, Schmidt has been going through a period where he seems ready to "get rid of his non-essentials" and arrive at the realization of what truly matters to him. The Hollywood Reporter also recently reported Fred Armisen has been linked to guest-star as a temporary roommate at the loft in at least one episode during the upcoming season.

According to TV Line, Fox execs have already greenlit the show for another season and production has already started.

"New Girl" stars Zooey Deschanel as Jess, Jake Johnson as Nick, Lamorne Morris as Winston, Max Greenfield as Schmidt and Hannah Simone as Cece. Longtime regular Damon Wayans Jr., who stars as Coach, is slated to leave the show at the end of the season.

Swift, 25, is known for such smash hits as "We Are Never Ever Getting Back Together," "Shake It Off," and "I Knew You Were Trouble."