Favourite of all time...? Gosh, I wouldn't know where to begin. That's a very tough decision! I'd probably have to limit it to a bunch to be fair.
One of the most memorable for me would have to be Melanie Blatt from girl band All Saints. She's one of the first that I remember following closely. I've just Googled this and I'm really struggling to believe that was 16 years ago...
Three more that would be very high up on my own list would be Christina Aguilera's first, Milla Jovovich and Ali Larter (who got huge).
An outside shout would have to go to Yulia Volkova (as already mentioned).