Leighton Meester attended the grand opening of the Harry Winston store in Shanghai yesterday. Ed Westwick was also present.
If you watch 'Gossip Girl' then you'd know why Leighton and Ed were there; in season three of the show, Ed's character planned on proposing to Leighton's character - the ring was from Harry Winston.
Leighton looked charming in a black tulle Marchesa dress which had a lace bodice and cap-sleeves. She wore it with wavy hair and Christian Louboutin pumps; the finishing touch was a diamond necklace of course.
Image Source: justjared