superfluous
Meaning: exceeding what is necessary
Usage: Tracy had already won the campaign so her constant flattery of others was superfluous.
ostentatious
Meaning: excessively showy, glitzy
Usage: On the palace tour, the guide focused on the ostentatious decorations and spoke little of the royal family’s history.
grandiose
Meaning: on a magnificent or exaggerated scale
Usage: Margaret planned a grandiose party, replete with elephants, trapeze artists, and clowns.