Fair Warning is the fourth studio album by American hard rock band Van Halen, released in 1981. Fair Warning went 2x platinum, which was disappointing compared to the sales of the band's previous albums, making it the least commercially successful album of the David Lee Roth years. The album featured a much more adventurous and progressive sound than most of their other albums, which may have been the cause of its disappointing sales. Also, unlike the previous 'party albums' the band released, this one had a darker and more brooding approach.