I do agree with you that this Gossip Girl often dresses too mature for her age (she's 15), but I think this is an age appropriate get up. She is wearing tights under her slashed Alexander Wang silver embellished dress . And, she is young and therefore has every right to wear a mini. I like her platinum blonde feathery 'do now that it's grown out a bit. Her pointy Balenciaga pumps are hard core and her silver cuffs added additional silver sassiness.
