I think Amanda (3) may have actually been the first to get her hair bleached. I *think* Shandi was lighted up with highlights, as opposed to actually bleached, but I may be remembering incorrectly. How did you find out about the edited first call-outs in the alien shoot? I always like hearing about the edits/what actually happens during filming, I think it's really interesting.
Maybe, I don’t really remember the method they used on Shandi, but Amanda was definitely bleached, so Michelle wasn’t the first.
It’s apparently common knowledge now, as it’s even on the Cycle 4 Wikipedia page. But you can tell without that too, because when Tiffany goes up to get her photo in panel, Kahlen is already mysteriously gone from the line-up (despite being shown in the line like 3 seconds beforehand), but everyone else is still there. They also made very sure not to show the line-up of the girls who are still in the competition, which made me know something was up.