Last Night's Look: Hit or Miss?

Vote on this week's styles including Fergie, Katy Perry more stars! You decide – are they fashionistas or flops?

ALEXA CHUNG

Also in London, the Brit trendsetter sports second-skin red jeans, a patterned button-up topped with an oversized blazer and on-trend cross-body bag to celebrate GQ's spring/summer style issue.