Singer Seo In Young has been in the business for many years, so it definitely comes as no surprise that she has had experience dating a fellow celebrity.According to an article in Allkpop, on the June 1st broadcast of KBS 2TV's 'Entertainment Relay', when asked, "Have you dated any celebrities?", Seo In Young answered, "Only once."I didn't want to go public with my relationship because of the pressure. That is why celebrities don't catch my eye even more."She added that she is more turned off by male celebrities now because of the burden coming from the public eye. Any guesses on who Seo In Young's mystery boyfriend was?