Almost half of Americans say they still listen to music most often on the radio.  According to a new poll conducted by "60 Minutes" and "Vanity Fair," 49 percent say the radio is the place they go to most often for music.  Seventeen percent say they use digital music services like Spotify or Pandora.  Digital services were the top choice for respondents ages 18 to 34, however.  Fifteen percent of the overall respondents say they use iPhones, iPods or other mp3 players, while nine percent chose CDs.  Only one percent of Americans say their most often listening tool is vinyl records.