I've seen a lot of the usual suspects, but noteworthy mentions of girls that used to send my hormones into the stratosphere include: Louise Nurding / Redknapp, Jennifer Connelly and Melissa Joan Hart.
Other less conventional choices or hidden gems I've not seen mentioned here are:
Harmony from The Queen's Nose (Victoria Shalet)
Sarah Hills from Eastenders (Daniela Denby-Ashe)
Tiffany from Eastenders (Martine McCutcheon in the era before her chin and cheekbones became rather erm... pronounced)
Here's a lovely image of Louise that you might not have seen:
Basically, she used to be a real-life Tifa Lockheart.