Blake Lively showed off that big engagement ring — and her legs! — on the red carpet at last night's 12/12/12/ concert in NYC. She wore orange Isabel Marant on the red carpet and during the show, when she spoke about those affected by superstorm Sandy in Connecticut and introduced a performance from Chris Martin. Also out for the show was Kristen Stewart, who took the stage after flying in from LA. Blake's been doing some traveling herself. She and husband Ryan Reynolds just wrapped up a romantic, PDA-filled getaway in Paris. It may have been a belated honeymoon for the pair, who tied the knot in September. It was right back to work for Blake, who had to wrap up shooting the final season of Gossip Girl. Her run as Serena van der Woodsen comes to an end on Monday when the series finale airs on The CW.