Hailey Bieber stuns in peekaboo style at Lori Harvey's birthday bash with Justin Bieber

Hailey Bieber spent last night in Los Angeles celebrating Lori Harvey's 26th birthday. Her husband, Justin Bieber, and close friends, such as Kendall Jenner and Justine Skye, were beside her. The star turned to the peekaboo trend for her evening attire, donning a lingerie-inspired dress.

The dress Hailey sported is a little black, strapless number from Alexandre Vauthier's Fall couture collection last year. This "expose and cover" ensemble featured enthralling tulle and transparent lace along the sides, baring skin subtly. Fastening our gaze to the front of the dress was a conspicuous gathered material, analogous with a jabot.

Hailey matched her dress with semi-transparent black tights, roughly 20 denier, anchored on a classic belt, alongside black satin heels with pointed toes. Adding the final touches to her outfit were sizable gold earrings and a patent leather shoulder bag shaped like a curvaceous "C".

The peekaboo trend, or "expose and cover" strategy, is named after the children's game, "peekaboo", a simplified version of hide-and-seek. The concept encourages one to highlight the parts of the body they are most proud of - this could be the waist or back, for example - and conceal other parts. This strategy lays a simple groundwork to visually modify our figure, showcasing what we appreciate about ourselves.

Although Hailey Bieber leaned towards this trend for a party, the "expose and cover" guidelines can also be incorporated into casual everyday outfits. For instance, one can adorn a transparent blouse paired with conspicuous underwear in a contrasting shade, a blouse showcasing a generous back neckline, or thin tights.