North West, younger brother Saint and cousin Penelope Disick sings Sinead O'Connor's Nothing
North West and Penelope Disick regularly danced at Kanye West's Sunday Service performances.
But now it appears his his family members North West, five, Saint West, three, and their cousin Penelope Disick, six, are taking center stage, as they joined a children's choir for the performance on Sunday in Calabasas, California.
The children belted out a rendition of Sinead O'Connor's 1990 hit Nothing Compares 2 U, originally penned by Prince.
Scroll down for video