Ace Frehley, the original lead guitarist for KISS, was joined onstage Saturday night by former Guns n' Roses and current Velvet revolver guitarist Slash for a performance of the KISS classic "Cold Gin". The show was held at the Viper Room during the Sunset Strip Music Festival in West Hollywood. Check out a brief clip of the two onstage together below. Also check out Frehley's performance of "Shock Me" with an extended solo from the Ace. Frehley's new album, "Anomaly" is set for release tomorrow.