Blake Lively: Lady Gaga's Workshop Launch!

Blake Lively goes blue for the celebration launch of Gaga’s Workshop at Barneys New York on Monday (November 21) in New York City.

The 24-year-old actress, wearing an Elie Saab single button shawl lapel suit, was joined at the event by her Gossip Girl co-star Matthew Settle!

PHOTOS: Check out the latest pics of Blake Lively

Blake recently teased her fans with some upcoming Gossip Girl tidbits.

In an upcoming ep, Blake told Entertainment Weekly a dance scene was recently filmed where “we were all dressed as people who are not ourselves.”