Wow, this was a tough choice to make. Almost all my cacti seem to be flowering in the color pink.
I do like the last image of the Echinocereus that Hob placed. What species is that? Also, the two images Buck posted of the Cereus huntingtonianus are amazing and would be worthy of winning this contest.
I did look and discard the following:
Another Echinocereus pectinatus (a very close call to the one selected)
And finally, three images of Echinocactus horizonthalonius with their hot pink flowers