Earlier this week, we were feeling spring thanks to Jennifer Lopez‘s punchy yellow dress on Wednesday’s American Idol. But last night, Lopez swapped color for black and white, opting for a tweed dress, paired with sexy boots for a polished, demure look.

“We paired a black and white tweed dress from Rachel Zoe and over the knee suede boots to create a look that was classically elegant but with a sexy twist,” stylist Rob Zangardi tells InStyle.com exclusively. 

Want more J. Lo fashion? Tune in every Thursday and Friday this season to catch more of Jennifer Lopez’s American Idol style moments right here on InStyle.com, and see all of Jennifer Lopez’s head-to-toe looks from American Idol by clicking through our gallery!