Christina Aguilera paid tribute to her idol, Etta James, as the blues legend was laid to rest at a Los Angeles-area church today. Dressed in all black, the pop star belted out James’ classic “At Last,” sharing some heartfelt words with the congregation.

“I have to first of all say what an amazing honor it is for me to have been welcomed here today, invited here, to pay tribute to the great Ms. Etta James,” said an emotional Christina. “I went around the world throughout all my career saying that Ms. Etta James was my favorite singer in the whole wide world.”

Watch her stirring rendition below.