It was only last year when Seth Rogen and Rose Byrne tried to be the cool couple living next to a frat house in "Neighbors". We know how well that went for the couple and the boys next door, but it seems that Greek groups just won't leave the small family alone because this time, they're going to go face to face with a house full of girls in "Neighbors 2: Sorority Rising".

Seth, Rose and Zac Efron are back for the sequel, joined by Chloe Grace Moretz and yes, Selena Gomez.

It was a sly move, with no announcements whatsoever, but according to E! News, the singer was seen filming scenes on the Atlanta set, clad in a skintight pink dress, loud feather earrings, and strappy sandals, leaning over a shiny, new car.

The news outlet noted that production has been keeping the sequel's plot under wraps, but here are some things that we do know:

1) Chloe Grace Moretz is playing a member of a sorority, most likely the president. Her role was announced way back in April, which means that Selena's casting may be added in the last minute (or planned as a surprise).

2) Speaking of Selena's role -- she may be Chloe's archrival and nemesis, trying to take over the pack, which always makes a good story as far as sororities are concerned.

3) There is a slight confusion as to how Zac and Dave will fit in this plot, but hey, if we get to see more of Zac's shirtless Abercrombie and Fitch greeter gig, we're not complaining.

Selena's slimmed down-frame, Mirror UK mentioned, came just five months after critics hit at her for her weight gain. However, this isn't the debut of her new bod as she made a dramatic entrance with Taylor Swift and the rest of the "Bad Blood" squad at this year's MTV VMAs.

And no, she did not get to see her ex, Justin Bieber breakdown on stage because according to Entertainment Tonight, she exited the venue just before his performance. Not that she wanted people to record any of it if she was there, either. She opened up about her frustration to the public's unwavering link to Justin to the Sunday Times. "It's difficult for people to separate us. The Internet wants to freeze this moment in time and constantly repeat it," she said.

Check out photos of Selena from the set of "Neighbors 2", but before you can catch her in a sorority, check out her latest film, "Hotel Transylvania 2", which will be in theaters later this year.