Today marks the 80th birthday of the Kalin Twins, brothers Hal and Herbie, who hit the charts big in 1958 with their rendition of "When," which reached No. 5 on the Top 100 before going on to … not much of anything. Their second single, "Forget Me Not," reached No. 12, but fans apparently did forget them, and subsequent releases never came close to matching that success. The twins went back to their normal lives, performing a few more times in the 1970s and one final time in 1989 at Wembley Stadium for Cliff Richard. Hal died in 2005, and Herbie died July 21, 2006. In honor of the brief-but-beautiful career of these one-hit wonders, take a look at our roundup of artists who burned up the charts and never came back.