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Jessica Simpson, Fashion Star

NBC

This week on Fashion Star, it's all about summertime clothes. And when it comes to pool party attire, Jessica Simpson considers herself an expert.

In this exclusive clip from Friday's episode, Simpson talks to her team about how to design a summer line, and gives her must-have items for the parties that come when the weather heats up. Guess what her two clothing go-tos are?

Check out the exclusive preview below to find out! 

(E! and NBC are both part of the NBCUniversal family.)