MOSCOW - Moving to the beat of 1990s pop hit "American Boy", Russian President Dmitry Medvedev's stiff dance moves became an immediate viral hit on YouTube on Wednesday.Sporting a form-fitting silver jacket and open collar, Medvedev somewhat awkwardly wiggles his hips and kicks up his heels with other party guests in the half-minute clip posted late on Tuesday.The performance attracted mixed but plentiful reactions from Russians, with nearly 300 comments only hours after it was posted."It looks like Medvedev's swallowed a stick," one viewer commented."You dance like my father!" twitter user Stacey Uliss wrote on Medvedev's page, to which the tech-savvy, 45-year-old president promptly posted a good-natured response."Age-wise that seems to be the case," he tweeted, admitting the tune and his dance moves were dated."We were partying at a meeting with (former) classmates a year ago. The dances/music are still those from the past."The Russian pop song that set him grooving topped charts in 1990 when its lyrics about escaping with a foreigner struck a chord amid the economic hardship and uncertainty accompanying the collapse of the Soviet Union.