Hi Infidelity is the ninth studio album by American rock band REO Speedwagon, released on November 21, 1980, by Epic Records. The album became a big hit in the United States, peaking at number one on the Billboard 200, spending 15 weeks at number one. It went on to become the biggest-selling album of 1981, eventually being certified 10 times platinum by the Recording Industry Association of America. No. 1 on the Billboard 200 for 6 weeks, from the issue of May 16, 1981. Wiki link