Hilary Duff, Fergie and Vanessa Minnillo are part of the new fashion trend of "Formal Shorts."
From
People:
FORMAL SHORTS
Fergie, Hilary Duff and Vanessa Minnillo show off their enviable legs in shorts – a style that is just as appropriate for the red carpet as the chic streets of L.A. 
Would you wear this trend? Vote at
People.com.