Selena Gomez allegedly has set a deadline for Justin Bieber to make his move to rekindle their relationship.

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If Bieber doesn't do something big before 2015, Gomez is likely to give up on him all together, HollywoodLife reported on Wednesday.

A source told them that since she wants to settle down and have a family one day, she won't wait around for him to grow up.

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"If Justin doesn't make a move to win Selena back before the new year, she will move on from him 100%. She's patient - patient like a saint - but she's tired of his immature behavior. She wants to eventually settle down and have a family one day. She's not going to wait around for Justin to grow up," the source said.

With Gomez's newfound self-worth, she's sticking to her word on this one, but she seems to think Bieber will react just the way she wants him to.

"Selena is pretty confident that Justin will wake up one morning and realize that she's gone for good, that he lost the best thing he ever had," the source said.

But what kind of grand gesture is big enough? Apparently, a proposal isn't exactly necessary.

"If Justin whisked Selena away on a romantic holiday vacation and gave her a promise ring, that would do the job. Selena is not a high-maintenance prima donna, but she does want her man to treat her like his queen. Basically, Justin needs to make a huge effort and the the clock is ticking," the source said.

Meanwhile, a new video of the couple at their mutual church, Hillsong LA, has been released by a fan.

On Wednesday, International Business Times reported that churchgoers saw the couple together. The video allegedly shows Gomez and Bieber with a group of friends in the front row.

Supposedly, Gomez is the girl in the white with her hair in a bun and Bieber is believed to be the guy with a white cap on, standing beside a man dressed in a black shirt.