Aishwarys Rai: Sleepless for guru

We all know that a certain khan can go without long hours of sleep during shooting schedules. His co-stars even swear that he just doesn’t go to sleep – yes we are talking about SRK. And now we hear Aishwarya rai is following his ‘insomniac’ footsteps. The actress was recently so engrossed in shooting for Mani Ratnam’s Guru that she shot non-stop for 12 hours at a stretch for six days in a row – even with location changes every alternate day. Is SRK looking over his shoulder for some competition already?