It's been an intense year of back and forth for Jelena, but there are signs that they may reconcile in 2016.
It's been a whirlwind year for Jelena (the famously coined nickname fans dubbed Justin Bieber and Selena Gomez back in 2011, when the pair first started dating).
The superstars split in 2014 after years of rollercoaster romance, but in 2015, there was no escaping the signs that a reconciliation could happen. Not only did the on-again, off-again couple gush over each other while promoting their new albums -- Selena's Revival and Justin's Purpose -- but they were spotted together multiple times.
WATCH: Justin Bieber Opens Up About Reconciling With His Ex
We've compiled their sweetest moments together into one place. Check out the video above and read on below for all the highlights from their ups and downs.
The first signs of a Jelena reunion began in May, when both stars attended the Met Gala in New York City. The "Good For You" singer stunned in a backless white Vera Wang gown, and while the two didn't have a red carpet run-in, Justin was clearly a fan of Selena's chic look. As he was leaving, Justin shouted to the paparazzi, "Hey, Selena looked gorgeous at the Met Ball!"
Just a few weeks later, the pair was seen together in a Snapchat video posted by Hillsong pastor Rich Wilkerson Jr.
In June, Justin debuted his highly anticipated single, "Where R U Now." Fans were quick to notice that in the music video for the catchy tune, an image that read, "Where R [U] Now, Selena?" appeared.
WATCH: Justin Bieber Parties In Miami While Selena Gomez's New Relationship Heats Up
Biebs is all about dropping music video hints. In September, Selena's name also appeared in his "What Do You Mean?" video, this time in the form of graffiti.
A few months later, Selena landed the October 2015 cover of Elle, and she told the magazine, "I'll forever support him and love him in a way that ... We grew up together." When asked if they'd ever get back together, Selena didn't rule it out, laughing as she said, "I don't know!"
The 23-year-old singer echoed a similar sentiment in an interview with the New York Times.
"While people were writing that I was stupid for being in [the relationship], this is what I always saw in him," she said about his comeback. "I'm like, duh!"
Justin gave us another glimpse into their intense relationship in the Oct/Nov 2015 issue of Complex.
"We were so in love. Nothing else mattered. We were all about each other," he revealed. "I moved in with my girlfriend when I was 18. Started my own life with her. It was a marriage kind of thing. Living with a girl, it was just too much at that age... When stuff would happen, I would lose my freakin' mind, and she would lose her mind, and we would fight so hard because we were so invested in each other."
WATCH: Selena Gomez Says She'll Always Love Justin Bieber
Then in October, a duet the two recorded three years ago called "Stronger" -- a song which basically told the story of what went wrong during their relationship -- leaked.
One month later, Justin turned up the heat during an interview with Billboard. When asked what inspires his writing, he said his "ex-girlfriend."
During an appearance on The Ellen DeGeneres Show, Justin also confirmed that three notable songs off Purpose were about Selena, and he wasn't completely ruling out the possibility of dating the former Disney star again.
"We have a lot of history together so it could possibly happen," the 21-year-old said. "I think we're both just on our own journeys, figuring ourselves out and once we've figured ourselves out we could maybe come together and make an awesome duo. Or she'll find someone awesome and I'll find someone awesome... I just want her to be happy, honestly."
Shortly after, on Nov. 21, Selena and Justin were spotted spending intimate time together at The Montage Hotel in Beverly Hills. Guests at the hotel bar even got video footage of Justin as he serenaded Selena.
WATCH: Selena Gomez Picks One Direction Over Justin Bieber
The romance doesn't stop there, as Justin has clearly been feeling nostalgic lately. Earlier this month, he posted two throwback photos of himself and Selena to Instagram.
The pictures come amidst rumors that his former flame was getting cozy with One Direction's Niall Horan. ET confirms the pair shared a kiss at Jenna Dewan-Tatum's birthday party following their KIIS FM iHeart Radio Jingle Ball performances on Dec. 4.
But on Friday, Selena told ET there's nothing romantic going on between her and the 1D heartthrob.
WATCH: Selena Gomez Denies Dating Niall Horan
What do you think: Is it too late for Justin to say "Sorry"? Should Justin and Selena give their love another shot? Let @Katie_Krause and @HerNameIsDeidre know on Twitter or in the comments section.
While Selena and Niall were exchanging laughs in Los Angeles, Justin was in Miami, Florida, partying with pals and giving impromptu performances inside two nightclubs. Watch the video below to see more.