Lupita Nyong'o's Oscars 2015 gown cost $150,000

Audrey Hepburn's 1954 Oscar Gown; $131,300

Princess Diana's Cannes Film Festival Dress; $137,500

Elizabeth Taylor's 1970 Oscars Dress; $167,500

Cate Blanchett's 2007 Oscars Gown; $200,000

Beyoncé's 2016 Met Gala Dress

Paris Hilton's Hollywood Beauty Awards Dress; $270,000

Kate Middleton's Wedding Dress; $400,000

Julie Andrews' "Sound of Music" Dress; $1.56 million

Nicole Kidman's 1997 Oscars Dress; $2 Million