Day 4 of 70000 Tons of Metal is always the craziest, with many cruisers dressing up for the unofficial costume party. The All-Star Jam (aka Jamming in International Waters) featured musicians from various bands performing classic metal covers. There were music clinics where artists such as Flo Mounier of Cryptopsy taught eager fans how to hone their instrument skills. Musicians and metalheads partook in Karaoke which was on the pool deck for the last night of the cruise and lasted long into the wee hours of the morning.