Kristen Stewart headed out of LA on a private jet yesterday afternoon. She's in the midst of a busy promotional season for her upcoming movie On the Road, which will be out in limited release on Dec. 21. The last week has seen Kristen and her costar Garrett Hedlund attending events for the picture in LA and even outside San Francisco, where they attended a special screening at Skywalker Ranch in Marin County. The next few days will be full of NYC interviews and press days. The PR blitz comes after another big year for Kristen — is she your favorite female celebrity of 2012?