7. ALICIA KEYS & SWIZZ BEATZ
The R&B songstress and her producer husband were married in Corsica in July 2010, but their respective careers had been impressively established long before that. Keys immediately became a star with debut disc "Songs in A Minor" in 2001, and has gone on to release four more best-selling albums; Swizz Beatz, meanwhile, has helmed hits for a large fraction of the hip-hop universe, from Jay-Z to DMX to T.I., while releasing solo material in between business ventures. Still, Keys has the bragging rights in the relationship, moving 18 million total albums to Swizz's 400,000.