A lacy black top over a plain vest and shorts over tights made for a cute trans-seasonal wardrobe (from which the gentleman in the background could learn a lot). We're wondering whether the dishevelled hair is a style choice or more of a windy weather creation, though.
Sidenote: Coleen was on Twitter before the concert explaining that she's had a haircut, billing it as "a choppy bob". This is not a choppy bob.
Shop Coleen's concert style in the MyDaily store:
And don't forget to check out Rihanna's recent street style: