emptyheaded (adjective) empty-headed: flighty, scatterbrained
Sinonime: cheesy*, cornball,
corny*, cutesy, drippy, gooey, honeyed, mushy, over-sentimental, oversweet,
saccharine,
sappy,
sentimental, sugary, syrupy
Antonime: cognizant,
intelligent,
sensible,
slick,
smart