non-issue. Shoe change: she has her more comfortable "walking" heels (esp. on the asphalt) and then her "fancy" green (or blue whatever) heels for the event. Shoe changes for a woman is not that big of a deal, esp. with an event. Some shoes do not do well on the asphalt and you don't want to ruin them. Later on when they are walking down the street, she's back in the walking tan colored heels after changing them from the green "event" fancy heels.