The pop star wore a Christian Lacroix gown and her bridesmaids wore dresses designed by Stevie Wonder's wife, Kai Milla, for the Saturday nuptials at the Staglin Family Vineyards in Rutherford, Calif., People magazine reported.
The couple's wedding bands were made by London's Stephen Webster, who also created Aguilera's 5 carat, diamond-and-platinum engagement ring.
Aguilera, 24, and Bratman, 28, had asked guests to make donations to relief funds for Hurricane Katrina and Rita victims instead of buy them wedding gifts.
Notable deaths of 2014 [PHOTOS]
Queen Elizabeth II sends out her first tweet