Kanye West sings a song for his mother at the Grammys.

KANYE WEST delivered a moving vocal tribute to his late mother, DONDA WEST, that brought tonight's Grammy audience to its feet. (For our full Grammy coverage, click here.)

The singer/rapper performed 'Stronger' from his most recent album, followed up by an updated version of his 2005 song, 'Hey Mama.'

West, who took the stage with the word "Mama" shaved into his head, was emotional as he sang the moving tribute before a respectful audience, which gave him a standing ovation after the performance. After he won the Grammy for Best Rap Album, he asked that the cue music be stopped so he could say a few words about her -- thanking everyone for the support and prayers and promising to keep making her proud.

Donda West, who raised Kanye as a single mother and was an ever-present fixture by his side, died in November 2007 due to complications following surgery.