2. Mariah Carey and Nick Cannon

Mariah Carey and Nick Cannon met while filming the diva's video for "Bye Bye" in March 2008, then they wed in the Bahamas that May. At the time, rumors swirled about the nuptials being a publicity stunt, but they welcomed twins on their anniversary in 2011 and renewed their vows in 2013. But in August 2014, rumors swirled that the pair had been living separately for months and were headed for a split.