Here are four tips ET learned at the shoot:
1. Let it all hang out. If you got it flaunt it.
"Just know where to hide the candy," Alexander told us. "There's things you have to do to not let it be shown."
2. Own it. Confidence goes a long way. If the models don't look like they're enjoying the shoot, the fans aren't going to enjoy the pictures.
3. Sure, it's supposed to be fun, but it's still work.
"You have to bring your energy and just think this is something that is very serious and we're going to take it seriously," said Alexander.
4. Try some creative covering. You can't just cover your body with your hands like you jumped out of the shower without a towel.
"Just be sexy about it," Alexander said.
ANTM airs tonight at 9/8c on The CW. Watch the video for a look at Tyra Banks' expert demonstration of creative covering up.