It all happened so fast.

The scene at VIBES by "Sports Illustrated" swimsuit issue's inaugural musical festival began on a relatively tame note.

One minute, a gaggle of VIP ticket holders were sampling braised goat crafted by Houston's own Chris Shepherd, a James Beard nominee of Underbelly fame, outside of Post HTX, the former downtown post office. Then someone spotted John Legend moving quickly through the crowd. Clad in a studded black motorcycle jacket, the Grammy Award-winning artist hustled toward his wife, Chrissy Teigen, who appeared out thin air by the lineup of chefs' tents.

Her leather-wrapped ponytail swung as she told onlookers, "Frito pie is my favorite to-go food on the planet. You can put whatever you what on it." The eight-time "Sports Illustrated" swimsuit issue model then proceeded to spoon-feed fans for the camera. And Instagram. And Snapchat. Less than five feet away, Legend helped himself to generous helpings Frito pie - topped with jalapeños, guacamole, and sour cream - in addition to his wife's spicy cornbread, prepared from the original recipe featured in Teigen's bestselling cookbook, "Cravings."

"We're serving up Smirnoff jalapeño Moscow Mules, because they go together so perfectly," she added as cocktail servers began circling with trays topped by copper mugs.

A few minutes later, the couple abandoned their post to meet-and-greet Shepherd and Tyson Cole, the Austin-based chef/restaurateur behind Uchi and Uchiko.

Then it was onto the Lexus VIP tents where three-time "Sports Illustrated" swimsuit issue cover girl Kate Upton was enjoying a private moment. The calm shattered once Teigen and Upton embraced. Cameras flashed and security guards were immediately overwhelmed by the onslaught of party-goers eagerly snapping away at the celebrity girl friends (especially when Upton struggled to adjust her strapless black dress).

The velvet rope-barricaded area filled quickly. Christie Brinkley sipped cocktails and waved to patrons until the evening's headliner, Miguel, popped onto the nearby stage in a sudden flash of spotlights and bass. In the crowd, swimsuit issue rookies Lais Ribeiro and Vita Sidorkina danced against Houston's downtown skyline. Legend was spotted again on a lounge loveseat, this time taking in the show next to Olympic gymnast Aly Raisman.

So much for tame.