Nancy Sinatra: I was too shy for showbusiness

Singer says she did not have the confidence for a big career' such as her father, Frank, enjoyed

The singer Nancy Sinatra has said she lacked the confidence to pursue a big career" in showbusiness as her father, Frank, did.

The singer established herself as a musical force in her own right during the 60s with her signature hit These Boots Are Made for Walkin' and the title song of the James Bond film You Only Live Twice.