ET's rounded up the 10 best moments that had fans in frenzy this year!
From band break-ups to season finale bombshells, we've rounded up the most memorable moments that had fans going absolutely ballistic in 2015.
Beyhive Loses It When Beyonce Pours $20K Bottle of Champagne in Hot Tub
We're "Drunk in Love" with this story! In May, the 34-year-old singer caused a frenzy when the music video for "Feeling Myself" with Nicki Minaj dropped on Tidal. In one scene, Queen B chills in a hot tub and pours a gold bottle of bubbly -- later identified as Armand de Brignac (aka Ace of Spades), which retails for $300 to $20K -- into the hot water. Though the bottle most likely didn't cost her a thing (her hubby Jay Z owns the company!), fans couldn't help themselves from criticizing the "valuable waste," tweeting things like, "Beyoncé pouring my college tuition fees into a hot tub" and "When someone asks where I wanna be in the future, I just show them the scene where Beyoncé pours a $20K bottle of champagne into the hot tub." Cheers!
Monsters Freak Out When Lady Gaga Appears on American Horror Story: Hotel
Gaga is no stranger to surprising her Monsters with her quirky fashion choices, but the 29-year-old singer really freaked them out when she announced she'd be joining the cast of American Horror Story for season five in a Twitter video in February. Following the show's premiere, plenty of fans took to social media to express their thoughts on Mother Monster's AHS debut. "I've never watched #AmericanHorrorStory before," user @PixelChick77 wrote. "Because of my love of @ladygaga I watched tonight. Omg. So in love with it. Especially her." Best. Casting. Ever!
Beliebers Go Crazy Over a Possible Jelena Reunion
When it comes to his relationship with his on-again, off-again girlfriend, Selena Gomez, the 21-year-old pop star will "Never Say Never" to letting her go. His fans totally lost it when they saw photos and videos of the "Sorry" singer serenading Gomez -- whom he dated on and off between 2011 and 2014 -- at a hotel bar inside the Montage Beverly Hills Hotel in Los Angeles in November. Beliebers really believed a Jelena reunion was happening after he shared back-to-back throwback photos of himself and the former Disney star to Instagram. Even rapper Drake freaked out, commenting, "Damn thought this was a Jelena current day flick," on one of the photos. Stop teasing us, Biebs!
Directioners Cry Over Zayn Malik Leaving the Band
One Direction fans all over the world were literally in tears on Mar. 25 when they learned the 22-year-old was leaving the band. Even their frontman, Harry Styles, shed some tears in 1D's first show without Malik. Within seconds of the announcement, #ByeZayn was trending on Twitter and the tweets from heartbroken tweens, like "THIS IS ALL THE HATERS FAULT" and "I'm trying so hard to stay strong for him, but I've never cried so much in my whole life, and I've never felt so broken or empty," were epic. The sadness was SO real.
Lakers Fans Break the Internet With Discovery of Kobe Bryant Retiring From NBA
While rumors were swirling for a while that the 37-year-old NBA pro might be on his way to retirement, Bryant made it official on Nov. 29 with a passionate poem dedicated to basketball. The emotional letter was posted on The Players Tribune and the website almost immediately crashed due to so many visitors. The news instantly became a trending topic on Twitter, as celebrities, Lakers fans and sports professionals took to the social media site to express their thoughts on his departure. We give this baller move all the points!
Adam Levine Shaves His Head, Maroon 5 Fans 'Can't Even'
The 36-year-old proved blondes have more fun last year when he dyed his hair as bright as his fellow Voice coach Gwen Stefani's, but in 2015, he debuted the most drastic hairdo of them all. The Maroon 5 frontman had all his fans screaming, 'NOOOOOOOO!' when he shaved his head and went completely bald in July. Luckily his wife, Behati Prinsloo, didn't seem to be as heartbroken.
Pretty Little Liars Fans Stumped Over A's Identity
After literally waiting for years to find out who 'A' was, the season six summer finale in August revealed the mysterious character once and for all in a crazy transgender twist that blew everyone's minds. The liars learned that Charles DiLaurentis was actually the same person as CeCe Drake -- Charles "died" inside Radley and re-emerged as CeCe. Did anyone see that coming?
Game of Thrones Fans Devastated Over Jon Snow's 'Death'
In the final moments of the season five finale, fan favorite Jon Snow appeared to be killed off from the HBO series, as he was stabbed in the chest by a fellow Night Watcher. Fans of the show took to Twitter to share their grief, and some even took it to a whole new level by uploading emotional reaction videos -- complete with tears and anger -- to YouTube. But is he actually dead? The ongoing debate continues on social media, and although the trailer for season six hints at his return, it looks like we'll have to wait until April 2016 to find out. We think twitter user @molliejoxo says it best: "If Melisandre doesn't bring Jon Snow back to life I swear I will be in a forever depression like omg #crying."
KatyCats Come to Katy Perry’s Rescue After Major Social Media Oops
In April, the "Dark Horse" singer shared a photo of her dog, Butters, to her then 70 million Twitter followers and 16 million Instagram followers. She didn't realize, however, that Butters' dog tag, which is engraved with her phone number, was in clear sight before she posted it. Luckily, her passionate KatyCats came to the rescue, calling attention to the fail by sending her thousands of funny and very concerned tweets! Soon after she got the memo, Perry deleted the photo and changed her number. Good call!
Kardashian Krew Flips Out Over Kylie Jenner's First Major Cleavage Photo
Back in January, Keeping Up With the Kardashians fans had no idea that the 18-year-old would be the new star of the Kardashian and Jenner spotlight in 2015 (sorry, Kim Kardashian). While Jenner is no stranger to showing off her toned body on social media now, she got her followers riled up when she put her cleavage on full display in a super racy photo posted to her Instagram on Jan. 7. Her fans immediately reacted, some even accusing her of getting breast implants.