Chicagoan Allegra Rosenberg, 17, has become a YouTube sensation, writing songs beloved by fans of Doctor Who, BBC Sherlock and other off-beat pop culture hits. We revist Jay Shefsky's profile. Watch music videos.
Allegra Rosenberg
Chicagoan Allegra Rosenberg, 17, has become a YouTube sensation, writing songs beloved by fans of Doctor Who, BBC Sherlock and other off-beat pop culture hits. Jay Shefsky has a profile.
