The singer and the Chicago White Sox pitcher exchanged vows at a sunset ceremony in Tennessee's Smoky Mountains on Thursday (24Oct13).
Gushing about her new husband, the 27 year old says, "I married my best friend. He has such a good heart."
The couple met after a show in Chicago, Illinois in 2011.
Lambert's husband Blake Shelton officiated the nuptials, which took place at Blackberry Farm, where Kelly Clarkson wed Brandon Blackstock over the weekend (19-20Oct13). Lambert was Monroe's maid of honour and also served as wedding planner.
The bride tells People.com, "Miranda was the one who cared about all the details. It was magical."