Christina Aguilera performed James' timeless hit "At Last," while Stevie Wonder sang with the church choir. Rev. Al Sharpton delivered the eulogy.
Aguilera, 31, has been a longtime fan of James. "Her raw tone and the passion she put forth on a record spoke to me at a very young age and has continued to influence and inspire me throughout my career," The Voice mentor explained on her official website. "Etta James was a force to be reckoned with. A true gift to music and a woman of great spirit and courage."