Between back to school shopping and fashion week, September is truly the month of fashion reinventions and celebrating personal style—and who are more stylish than our resident reigning pop stars?

PopCrush Best Dressed is a month-long competition to determine the ultimate style stars of 2017!

English singer-songwriter Dua Lipa's got "New Rules": Always look fierce, cool and chic. The rising pop star battles solo breakout and former Fifth Harmony singer Camila Cabello during Round 1—but which emerging diva takes the throne as 2017's best dressed?

The battle begins right now: Place your vote between Dua Lipa and Camila Cabello for 2017’s Best Dressed! Round 1 ends Monday, September 18 at 11:59 p.m. EST.

Camila Cabello Through the Years: