New Interview: 'Vicky Cristina Barcelona' star Scarlett Johansson chats about everything from her much-talked-about kissing scenes with co-stars Penelope Cruz and Javier Bardem to her involvement with Barack Obama's presidential campaign.

In theaters August 15, 'Vicky Cristina Barcelona' casts Scarlett as an emotionally and sexually adventurous American woman in Barcelona who becomes romantically entangled with a charismatic painter (played by new Oscar winner Bardem) and his tempestuous ex-wife (played by Cruz).