WATCH: Christina Aguilera Pays Tribute to Etta James

Christina Aguilera serenaded mourners at the private funeral of legendary performer Etta James this past Saturday. The half-Ecuadorian singer belted a teary, soulful rendition of James’ “At Last.” Stevie Wonder also performed singing “Shelter in the Rain” and “The Lord’s Prayer.”

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A Grammy Award winner and a member of the Rock and Roll Hall of Fame, James whose hits have included “All I Could Do Is Cry,” “Tell Mama,” “Sunday Kind of Love,” and “Pushover” was diagnosed with Alzheimer’s in 2009 and last year was told by her live-in doctor that her leukemia was incurable.

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“I think it was her authenticity that was part of the charisma that drew people to her…It was Etta James that bridged rhythm and blues with rock and roll,” Rev. Al Sharpton claimed in James' eulogy according to The Hollywood Reporter.