Before anyone else points it out: the eye colour of the first cover is different; however, Sexy is one of those mags that regularly fiddled with cover images, and eye colour fiddling is one of the easier manipulations, and that deep blue eye colour looks a bit iffy to me.
Anyway, I'd like to know the name of the girl on the Sexy cover, and very much suspect that all three covers are showing the same woman. Do we know her though?