I was completely foxed by "cayenas" which I of course thought would mean "cayennes", but I don't think that particular spice would be much use as decorative material for a girl. So I checked in in the RAE dictionary and discovered that it has a second meaning in Venezuela in the Dominican Republic where it is used as the name for the local varieties of Rose Mallow (a genus formally in botanical science called by its Greek name "ἱβίσκος" usually romanised/anglicised as "hibiscus" (or "ibiscus", in French the h is optional but it's mandatory in English) - and some of the rose mallows are rather beautiful, so eminently suitable for decorating a young lady. Given that the singer is from the Dominican Republic (and is also the song-writer, I think) that meaning of "cayenas" is the right one for translating this song. Apparently both Spanish meanings of "cayena" are derived from the same word (quiynha) in one of the languages of the Tupí language family of S. America.