As "Project Runway" legend Santino once sang it, "Lighten up, it's just fashion." Well, Season 15 is about to lighten our lives with its September 15 return, and the new promo promises everything we want from this show -- starting with the most important thing: fashion.

Entertainment Weekly shared the amazing trailer, which teases the first ever pop-up shop, a trip to an amusement park, and some promising designs from the new crop of talent. We even hear judge Zac Posen praise, "This is one of my favorite pieces I've seen in many seasons." But this wouldn't be reality TV without drama, so of course we also have designers fighting, crying, getting bored with the crying -- "If you are going to cry, go outside" -- and the judges offering their special brand of tough love:

Zac Posen: "It's kind of sad."

Nina Garcia: "Who is this bland person?"

Heidi Klum: "Does that mean you gave up?"

Zac: "Fashion isn't fair."

Zac got the most quotes in the promo, but really -- Nina only needs one sentence to destroy a designer for life.

Watch the magic happen:

Head here for the full list of Season 15 designers and guest judges.

The new season premieres Thursday, September 15 at 9 p.m. ET on Lifetime. Are you in or are you out?

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