Livin' Proof is the debut album from Gang Starr affiliates Group Home. The album featured the hit[citation needed] underground single "Supa Star" and the production work of DJ Premier. The album is known both for the supposed sub-par rhyming and superior instrumental work, It is widely considered to be Premier's most focused work to date[citation needed] but is often overshadowed by his work with more proficient emcees. Premier produced all the album's songs apart from "Serious Rap Shit" and "4 Give My Sins," which were produced by Guru and Big Jaz, respectively.\r \r "Supa Star" also appeared in the soundtrack of the 2008 video game Grand Theft Auto IV and is prominently featured in the movie Boiler Room.