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On Again? - We've waited patiently as the love saga between Chris Brown and Karrueche Tran has unfolded over the years. Will the former flames rekindle their romance? Will Brown's pleads for a second chance in the new song  "Back to Sleep" win her back? Click ahead for a play-by-play of the highs and lows of Chris and Kae.  By Britt Middleton(Photo: Imeh Akpanudosen/Getty Images for H&M)

Photo By Photo: Imeh Akpanudosen/Getty Images for H&M

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Back to Sleep - In the remix for Zayn Malik's song "Back to Sleep," Breezy croons: "Now where you been, it's been a year. Baby I ain't seen you, you know I miss you/ Baby let me love you back to sleep once more." He apologies for "f*****g around" with other women, then adds: "You want me to say your name girl?/ OK, Karrueche!"(Photo: Noam Galai/Getty Images for Mercedes-Benz Fashion Week)

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Kiss, Kiss - Kae and Breezy first starting dating in 2011. During their time together, they loved sharing their sweet moments on social media, like this snap. Kae captioned it, "always & forever."(Photo: Karrueche via Instagram)

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The Price of Fame - Back then, Karrueche was an up-and-coming model/actress, and dating Chris seemed to thrust her into the harsh glare of the limelight. The perks were, of course, going to fabulous parties and mingling with Chris's A-list friends like Kanye West and Kim Kardashian. The cons? The intense commentary from the critics, who zeroed in on every aspect of her life.(Photo: Chelsea Lauren/WireImage)

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A United Front - Kae stood by his side through his brushes with the law, including the aftermath of his 2009 assault of Rihanna. She presented a stoic front as she attended his various court appearances.(Photo: Frederick M. Brown/Getty Images)

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Rumor Has It - Rumors of infidelity on Chris's part perpetually rocked their four-year relationship. Perhaps the most infamous was an apparent fling he started back up with ex Rihanna while they were together. (Photo: Prince Williams/FilmMagic)

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Dark Times - And then there was Chris's three-month jail stint served in 2014 after violating his probation in the Rihanna case. By that point, things appeared rocky for Karrueche and Chris. Chris later accused her of cheating with Drake (among others) while he was locked up.(Photo: Mark Gail/For The Washington Post via Getty Images)

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The Final Straw? - Kae and Chris called it quits for good in March 2015 after it was revealed that he had fathered a baby girl, Royalty, with a former model named Nia Guzman. (Photos from left: Cassy Athena/London Ent/Splash News, Fernando Leon/Getty Images)

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That Old Thing Back - If we've learned anything from these two, it's that anything is possible. In the meantime, they seem to each be in a good place, with Breezy enjoying fatherhood and Karrueche making a name for herself in Hollywood. (Photo: Karrueche Tran via Instagram)