Just as he was about to be called up in 2002, pop singer Steve Yoo, better known in South Korea as Yoo Seung-Joon, gave up his Korean nationality and became a naturalised US citizen.
The South Korean government considered it an act of desertion and he was deported and banned from returning for life.
In an effort to overturn the ban, Yoo had filed a lawsuit with the Seoul Administrative Court, challenging the decision of a South Korean consulate in the United States to deny him a visa.
"If Yoo returns to South Korea and resumes activities, it will demoralise soldiers who are devoting themselves to serving the country, while provoking teenagers to evade the conscription," the Yonhap news agency quoted the ruling as saying.
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More than 60 years after the end of the Korean War, every South Korean man between the age of 18 and 35 is required to perform two years of military service.
The main rationale is the continued threat from nuclear-armed North Korea, given that the 1950-53 Korean conflict ended with a ceasefire rather than a peace treaty, leaving the two Koreas technically at war.
Hundreds try and avoid the draft every year, using tactics that range from extended overseas study, to starving themselves so that they fail the medical.
Other examples include the members of a break-dancing troupe arrested for pretending to have mental disorders, and a student who intentionally dislocated his shoulder and underwent surgery so as to fail the medical exam.
Some years ago, there was a mini-fad for large tattoos, which carry an organised-crime association in South Korea and can result in people being declared unsuitable for military service.