What is the song by slipknot with the little girl in the beginning?

The song you're referring to is "Snuff" by Slipknot. It features a haunting intro with a little girl’s voice, setting a somber tone for the track. "Snuff" showcases a more melodic and emotional side of the band, contrasting with their heavier sound. The lyrics explore themes of love and loss, making it one of their more poignant songs.