The Johnny Cupcakes Martha’s Vineyard Pop-Up Shop is back for the second year in a row! For one week only you can now pick-up some awesome JC t-shirts at Edgartown, Martha’s Vineyard from August 12th-14th and 17th-20th from 6pm to 11pm. So head down to the Dock Street Vineyard, 2 Dock Street, this week to pick up the Martha’s Vineyard Pop-Up Shop Exclusive Johnny Cupcakes t-shirts seen here.