They're on, then they're off, then they're on again.
With some celebs, it's hard to keep track of their relationship status because they've broken up and gotten back together so many times it's dizzying.
Are they destined to be together or just lack willpower?
We may never know, but the stars below, despite their many relationship flaws, just can't seem to quit each other.
Justin Bieber and Selena Gomez
Justin and Selena got together at a young age and did the breakup-makeup thing for years. Still, fans keep hoping for a Jelena reunion and seem convinced that they're meant for one another.
Kylie Jenner and Tyga
This tumultuous couple have called it quits a number of times but always seem to come back together, much to the dismay of fans who regard Tyga as a lowlife.
Miley Cyrus and Liam Hemsworth
Miley and Liam were engaged in 2012 but called it off the following year. In 2016, the pair reunited but kept silent in the press about their relationship status. Rumors of a Milam wedding are in the tabloids on a weekly basis.
Katy Perry and John Mayer
Just like Katy's song "Hot N Cold," these two flip flopped between the two a number of times before finally calling it quits in 2015. But is it for good?
Sharon and Ozzy Osbourne
Throughout 33 years of marriage, it's fair to say Sharon's put up with a lot. In 2013, she dumped Ozzy after he broke his sobriety but ultimately took him back. Then in 2016, she threw him out for cheating, but once again, the hitch couldn't keep them apart.
Amber Rose and Wiz Khalifa
After marrying in 2013, the pair broke up after Amber allegedly caught Wiz cheating. The pair co-parent their son Sebastian, have family time together and remain best friends. In fact, Amber has said she hopes she and Wiz will get back together sometime in the future, after he's done being a ho.
Khloe Kardashian and Lamar Odom
Khloe filed for divorce from Lamar in 2013, but called it off after his near-fatal overdose in a Nevada brothel. While they never "officially" reconciled, they hung out a lot and Khloe has admitted that Lamar is the love of her life. Unfortunately, his problems with substance abuse led her to re-file for divorce in 2016.
Megan Fox and Brian Austin Green
In their 12-year relationship (six of them married) these two have had a number of ups and downs. Their three-year engagement ended in 2009, but was back on the following year and they eventually married. In 2015, Megan filed for divorce, but after discovering she was pregnant with Green's baby, the two are giving it yet another shot.
Gigi Hadid and Zayn Malik
Gigi and Zayn started dating in 2015 but called it off several months later, just after her 21st birthday in May. But only a week after the breakup news went public, they were back in each other's beautifully sculpted arms.
Ben Affleck and Jennifer Garner
Ben and Jen announced the end of their marriage in 2015, but since then have seemingly taken no steps toward divorce. They still live together, vacation together, and insiders say they are attending marriage counseling in an attempt to reconcile.
Kourtney Kardashian and Scott Disick
After a number of years and three kids together (and at least a couple breakups), Kourtney finally kicked Scott to the curb after he cheated on her with an ex and his drinking had gotten uncontrollable. However, they still hang out regularly and Scott has been vocal about wanting her back. Kourtney hasn't ruled it out and still considers him part of the family.
Pink and Carey Hart
Since 2003, this couple has been on-again and off-again a number of times, including after they married in 2006. They welcomed a daughter in 2011 and luckily have stayed steady since then.
Sammi Giancola and Ronnie Ortiz-Magro
Viewing audiences witnessed all their turbulent, expletive-filled breakups and makeups on Jersey Shore, but the pair seemed to finally call it quits for good in 2014. But lo and behold, in 2016 we learned they got back together... for now.
Jennifer Lopez and Casper Smart
After getting together with her backup dancer in 2011, J. Lo dated Casper for three years before pulling the plug. However, the breakup didn't take and the two have been going strong since 2015.