Of course he would! How fucking shallow do 你 think he is?! He dated "non-famous" people before he became famous!! People like 你 get on my nerves. 你 think 名人 are in some fucking untouchable cult 或者 something when in reality their just people with jobs that make them well-known.
Actually, i think that Justin Bieber would 日期 someone famous. I was 阅读 a magazine this one time, and there was a quote 由 him that 说 he would 日期 a fan...so, yeah.