Adjectives

(s)flamboyant, showy, splashymarked by ostentation but often tasteless“a cheap showy rhinestone bracelet”, “a splashy half-page ad”
(s)showydisplaying brilliance and virtuosity
(s)flashy, gaudy, jazzy, showy, sporty(used especially of clothes) marked by conspicuous display
(s)glossy, showysuperficially attractive and stylish; suggesting wealth or expense“a glossy TV series”