Lady Gaga is one of the most versatile artists in recent memory. Few of her peers could hold a candle to her unabashed artistry. Charting a course through Gaga’s career trajectory is a fickle task.

After all, when the engaged couple docked their boat on Sept. 2 for the annual film event, their coordinating outfits were nothing less than molto bene. For her part, the “Applause” singer wore a long ...