Bone Thugs-N-Harmony is an influential American hip-hop group from Cleveland, Ohio, formed in 1991. The group's distinctive style, which includes a fast-paced, harmonizing vocal approach, blends elements of gangsta rap and melodic hooks, often with a spiritual focus. Key members Krayzie Bone, Layzie Bone, Bizzy Bone, Wish Bone, and Flesh-n-Bone have made indelible marks on the genre, with their critically acclaimed album "E. 1999 Eternal" featuring the Grammy-winning hit "Tha Crossroads". Bone Thugs-N-Harmony's unique sound and lyrical themes have significantly contributed to the development and evolution of mid-90s hip-hop.