famous for being famous

having no recognizable or distinct reason for one's fame other than high media exposure

徒有虚名

famous for fifteen minutes

enjoying a brief period of fame before fading back into obscurity

名声如昙花一现

famous last words

said as an ironic comment on or reply to an overconfident assertion that may well be proved wrong by events

但愿如此

‘I'll be perfectly OK on my own.’ ‘Famous last words,’ she thought to herself.

“我靠自己完全没问题。”“但愿如此，”她心里想。