Is joe jonas dating someone named gabrielle??

im just curious. i was on youtube watching the jonas brothers video sos and this girl said that the blonde girl in the video was gabrielle and that joe jonas was dating her.and i no the jonas brothers have an official myspace but do they each have seperate ones too?cuz the girl on youtube said that joe's myspace was www.myspace.com/therealjoejonasismadcool… can sum1 plz just tell me if that rlly is his myspace and if hes dating that girl????thnx!