Only 1 Man Could Pull Off All These Suits

Sam Smith will wear an assortment of Calvin Klein Collection pieces, designed by Calvin Klein men's Creative Director Italo Zucchelli. In addition to dress shirts and suede boots, the looks include two-button, notch-lapel, slim-fit suits in solid navy fine wool, dark gray micro-check fine wool, mid gray check fine wool, charcoal check fine wool, and navy large-check fine wool.

Roberto Cavalli spared no detail with these costumes! The Kaleidoscope Brodè dress is entirely embroidered in prism crystals, sequins, and iridescent micro baguettes, while "movements are emphasized by a play of fringes."

Source: Roberto Cavalli

Britney brought the circus to the stage in Dsquared2's big-top-approved designs for her 2009 tour. The looks, according to WWD, "reinterpreted clowns, trapeze artists, and jugglers into a series of provocative looks for Spears and her dancers." In addition to ringleader-inspired suiting, Britney took charge of her three-ring affair in the label's gold armor.

Another style partnership long in the making, Jennifer Lopez turned to Zuhair Murad for the kind of sultry looks that make the Lebanese designer her red carpet go-to. For her 2012 Summer tour, Jennifer kicked things off in Murad's sexy, sparkling jumpsuit.

In addition to onstage looks from The Blonds, Emilio Pucci, David Koma, Givenchy, Ralph & Russo, Alon Livne, and Tom Ford, Beyoncé took to The Mrs. Carter Show World Tour in Balmain's graphic black and white separates.

After lighting up the 52nd Grammy Awards' red carpet in Armani Privé, Lady Gaga brought the label's theatrics to the stage in a sculpted crystal-studded leotard. That would be far from the last time she turned to her designer pal, and she most notably went on to don Armani's spiked PVC costumes throughout her Born This Way Ball tour.

For her Diamonds world tour, Rihanna cloaked herself in Riccardo Tisci's Givenchy designs. Opening her show in dramatic fashion, the singer stormed the stage in 2013 wearing a bedazzled black and gold parka ornamented with Swarovski elements, embroidery, and (should all that be too understated!) a gold bullet motif.

But of course the queen mother of all designer-singer collaborations is Madonna's partnership with Jean Paul Gautier. The innovator of the performer's iconic cone bra teamed up once again with Madge in 2012 for her MDNA tour.