Bone Thugs-N-Harmony is an iconic Cleveland, Ohio-based hip-hop group formed in 1991, known for its unique blend of fast-paced rapping and melodic harmonies. The group was signed by Eazy-E to Ruthless Records in 1993. The 1995 album E. 1999 Eternal featured the hits "1st of tha Month" and the Grammy-winning tribute to Eazy-E, "Tha Crossroads". Recognized as one of the greatest hip-hop groups, they are the only group to have collaborated with Tupac, Notorious B.I.G., Eazy-E, and Big Pun while they were alive.