Katy Perry recently made headlines at the Tribeca Festival premiere of her new concert documentary, "Katy Perry: The Lifetimes Tour — Live From Paris." The singer, accompanied by boyfriend Justin Trudeau, stepped onto the red carpet in a vintage white Lanvin gown from the Spring 1987 collection.

While the event celebrated her film, much of the online conversation quickly shifted to her attire and appearance, highlighting how public figures' fashion choices can often overshadow the intended purpose of an event.

The archival Lanvin dress featured thick halter-style straps, rosette embellishments, a cinched waist, and a flowing A-line skirt.

Perry completed her look with white pumps, a vintage diamond ring, and an elegant updo.

However, as photos circulated online, many viewers focused on the fact that Perry appeared to be braless beneath the dress, with some specifically pointing to the visible outline of her nipples.

This observation led to a heated debate among social media users.

Some commenters made jokes about the visible outlines, while others defended Perry, noting that women have chosen not to wear bras for decades.

The discussion also veered into speculation about Perry's chest and potential cosmetic procedures, especially following recent reports of her weight loss.

According to sources, Perry has lost around 20 pounds due to a stricter diet and exercise routine, and there have been claims she considered breast enhancement surgery due to changes in her chest after weight loss and motherhood.

Beyond the discussion of her chest, many critics also targeted the dress itself.

Some compared the textured white fabric to baking decorations, with one user quipping, "Her dress looks like fondant… Fondant Cake a Perry." Others likened it to a hotel towel or called it "the ugliest dress I’ve ever seen." Despite the fashion commentary, the event also marked a significant relationship milestone for Perry and Trudeau, who made one of their most public appearances together, holding hands and dancing.

Perry openly expressed her feelings, telling the audience, "I’m very in love," and crediting her partner with helping her feel more grounded.