As Serena van der Woodsen, Blake Lively always rocks some seriously stylish threads -- and the outfits she wore while shooting "Gossip Girl" this week were no exception.
We've learned Blake's blue pants are from designer TIBI's Spring 2010 collection -- and retail for $258.
The Joie white racerback tank she's wearing under the sparkly gold jacket originally sold for $150 -- but can be purchased online for $109.99.
XOXO.
