Britney Spears wore a patchwork denim gown and Justin Timberlake ... While Spears and Timberlake were apparently completely earnest, Perry tweeted that her outfit was a custom Versace created ...

Wearing head-to-toe denim has never seemed like the most comfortable outfit solution—stylish, yes, a nod to Y2K icons Britney Spears and Justin Timberlake, yes—not cozy. But our real-life Barbie, ...