and tech titan and amazon founder jeff bezos, with fiancee lauren sanchez. then there are those with more unique costume choices. >> it is truly like a cocktail of power players in the culture. >> reporter: the black tie event held each year on the first monday in may is the soul fundraiser for the museum's fashion wing, the costume institute. this year's exhibit themed sleeping beauties: reawakingen fashion, spotlights 250 rarely seen designer pieces. >> it's called sleeping beauties because some of the gowns are so fragile that they have to be shown lying down in case. they can't even be hung on man kips. >> reporter: attending the gala can come at a steep price. >> it cost brands at least $350,000 per table. it costs individuals $75,000 a ticket. and you're also paying for a celebrity's dress, paying for hair and makeup, probably to stay in a hotel, to fly in, paying theriault epay ing their kent buck. >> those ticket prices were $75,000. and you have to be invited to pay that. >> reporter: still, what happens inside the ball is a bit of a mystery, with w