The Collaborative International Dictionary of English v.0.48:

Spangly \Span"gly\, a.
   Resembling, or consisting of, spangles; glittering; as,
   spangly light.
   [1913 Webster]

WordNet (r) 3.0 (2006):

spangly
    adj 1: covered with beads or jewels or sequins [syn: beady,
           gemmed, jeweled, jewelled, sequined, spangled,
           spangly]