Complex sentence: Doucet and McClelland were both established and successful singer-songwriters in their own right, both before and after they married in 2006, but opted in 2011 to put their solo careers on hold to work together as a band.
Split into simpler sentences: Doucet and McClelland were both established and successful singer-songwriters in their own right, both before and after they married in 2006. In 2011, they opted to put their solo careers on hold to work together as a band.