Katy Perry’s blue strapless cutout knit dress on American Idol

Carrie’s black check mini dress on American Idol

Metallic Tweed Halter Neck Minidress by Nadine Merabi at Nordstrom, $354.25 (was $545)

Hannah Harper’s sequin cape dress on American Idol

Sequined Cape Sleeves Mini Dress by Mac Duggal at Nordstrom, $598

Also available at: Macys

Hannah Harper’s yellow satin gathered dress on American Idol

Huntleigh Side Ruched Silk Blend Gown by Veronica Beard at Nordstrom, $798

Also available at: Shopbop | Mytheresa

Keyla Richardson’s sequin one-shoulder dress on American Idol

Farah One Shoulder Gown in gold by Bronx and Banco at Revolve, $728 (was $800)

Carrie’s black studded leather shorts on American Idol

The Barrow Studded Faux Leather Shorts by Blank NYC at Nordstrom, $118