Released on this day in 1974, Sheer Heart Attack is the 3rd studio album from Queen. Produced by Roy Thomas Baker, it was the bands breakthrough album in the US, reaching #12 on the Billboard Charts and featuring the band's first international hit "Killer Queen." In honor of the album's 50th anniversary, see the band performing the hit in 1974 on the British TV show Top of the Pops. (above)