Photos: Photos: Rihanna and Chris Brown Rihanna and Chris Brown through the years – Friends since 2005, Chris Brown and Rihanna went public with their romantic relationship in 2008. The couple went their separate ways after Brown pleaded guilty in June 2009 to assaulting the Barbadian singer on the eve of the 51st Grammy Awards. They then reconciled for a bit, only to break up again. Here's a look back at their rocky relationship: Hide Caption 1 of 16

Photos: Photos: Rihanna and Chris Brown Rihanna and Chris Brown through the years – In August 2007, Brown and Rihanna joined Timbaland, center, and Robin Thicke onstage during MTV's "Total Request Live" in New York Hide Caption 2 of 16

Photos: Photos: Rihanna and Chris Brown Rihanna and Chris Brown through the years – The couple spent time together on the beach in Barbados in August 2008. Hide Caption 3 of 16

Photos: Photos: Rihanna and Chris Brown Rihanna and Chris Brown through the years – Rihanna and Brown danced together at a club in Paris in December 2008. Hide Caption 4 of 16

Photos: Photos: Rihanna and Chris Brown Rihanna and Chris Brown through the years – In December 2008, Brown and Rihanna performed onstage during Z100's Jingle Ball in New York. Hide Caption 5 of 16

Photos: Photos: Rihanna and Chris Brown Rihanna and Chris Brown through the years – Brown stood beside his lawyer, Mark Geragos, at court in Los Angeles in March 2009. Brown was charged with assaulting Rihanna on February 8. "I'm in shock, because, first of all, that's not who I am as a person, and that's not who I promise I want to be," Brown told Larry King in August 2009. Hide Caption 6 of 16

Photos: Photos: Rihanna and Chris Brown Rihanna and Chris Brown through the years – Months after the incident, Rihanna left a preliminary hearing at court in Los Angeles in June 2009. "We just fell really fast, and the more in love we became, the more dangerous we became for each other -- equally as dangerous -- because it was a bit of an obsession," Rihanna said during a 2009 interview with Diane Sawyer Hide Caption 7 of 16

Photos: Photos: Rihanna and Chris Brown Rihanna and Chris Brown through the years – In June 2010, Brown performed a tribute to Michael Jackson during the BET Awards in Los Angeles. After Brown pleaded guilty to assaulting Rihanna, a restraining order mandated that the pair cut off communication and remain a certain distance apart. Hide Caption 8 of 16

Photos: Photos: Rihanna and Chris Brown Rihanna and Chris Brown through the years – Rihanna performs onstage during the 2011 Grammy Awards. In February, Schnegg lifted the "stay away" order imposed on Brown. Hide Caption 9 of 16

Photos: Photos: Rihanna and Chris Brown Rihanna and Chris Brown through the years – Brown with a cake at a party in New York honoring the March 2011 release of his "F.A.M.E." album. Hide Caption 10 of 16

Photos: Photos: Rihanna and Chris Brown The "Birthday Cake" singer opened up to Oprah about the night that changed everything between her and Brown during an August 2012 interview . "I lost my best friend," she said. "Everything I knew switched -- switched in a night -- and I couldn't control that, so I had to deal with that, and that's not easy for me to understand." Hide Caption 11 of 16

Photos: Photos: Rihanna and Chris Brown Rihanna and Chris Brown through the years – In 2012, the pair shocked onlookers when they cozied up to one another at a Lakers game on Christmas. Hide Caption 12 of 16

Photos: Photos: Rihanna and Chris Brown Rihanna and Chris Brown through the years – Rihanna opened up to Rolling Stone about her repaired relationship with Brown in the magazine's February 1, 2013 issue, and by February 6, the pair were seen cruising in Brown's car. Hide Caption 13 of 16

Photos: Photos: Rihanna and Chris Brown Rihanna and Chris Brown through the years – And by the Grammy Awards two weeks later, the pair were seen cuddling in the audience. Hide Caption 14 of 16

Photos: Photos: Rihanna and Chris Brown Rihanna and Chris Brown through the years – The rumors about the pair's romantic status heated up around Rihanna's 25th birthday in late February 2013 when the two were seen vacationing together. Hide Caption 15 of 16