We wonder what shocked fans more about Katy Perry's impromptu performance with BF John Mayer—the fact that the super busy artist found time to stop by or the fact that she came dressed like a 50-year-old business woman?!
Not to rain on this cool concert moment parade, but why is the "Roar" singer so conservatively dressed? Did she literally go from an uptown meeting with her financial planning team to this Brooklyn music venue? Because that's what this outfit suggests.