“Guess who she is” is a common phrase used in Engpsh when trying to guess the identity of someone.
It is a colloquial expression used informally in conversation and does not have a specific origin.
Example in Engpsh:
"Guess who I saw at the mall today?"
"Guess who she brought to the party last night?"
中文翻译：
“你猜我今天在商场里看见了谁？”
“你猜她昨晚带了谁去参加聚会？”