Credit: AP Photo/Ringo H.W. Chiu

The music world lost one of its greats when Etta James lost her two-year battle with leukemia January 20. Hundreds of the legendary blues singer's family, friends and fans gathered in an L.A.-area church Saturday to honor the "At Last" musician.

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."

James, a four-time Grammy Award winner, was inducted in the Rock and Roll Hall of Fame in 1993. The 73-year-old singer is survived by her husband and two sons.