顾里顾准傻傻分不清楚
[gù lĭ gù zhŭn shă shă fēn bù qīng chŭ]
It's derived from the character names 'Gu Li and Gu Zhun' of popular novels/movies which many readers/fans couldn't distinguish clearly due to similarity, hinting at confusion or adoration between beloved figures in media/imagery culture.