"Tears of Stone" (1999), the 33rd! studio album by The Chieftains, notable for its collaborations with prominent artists across various musical genres, blending traditional Irish music with contemporary influences. The album features partnerships with Joni Mitchell, Sinéad O'Connor, The Corrs, Mary Chapin Carpenter, Bonnie Raitt, Joan Osborne, Natalie Merchant (10,000 Maniacs), and others. Each contributing their distinctive vocal style and musical perspective to enrich The Chieftains' traditional Irish sound. It explores a diverse range of musical styles including folk, Celtic, and elements of rock and pop. Notable tracks include "The Magdalene Laundries" with Joni Mitchell, "I Know My Love" with The Corrs, "Factory Girl" with Sinéad O'Connor, and "The Lowlands of Holland" with Natalie Merchant. The album garnered several awards and nominations, notably winning the Grammy Award for Best Traditional Folk Album in 2000.