Here's why:
* Missing Subject: The sentence is missing a subject after "looked like." We need to know what "looked like" something.
* Incorrect Use of Question Mark: The sentence is not a question, so it should not end with a question mark.
Here are some possible ways to correct the sentence:
* Adding a Subject: "It looked like her and the creepy music teacher."
* Changing to a Question: "Did it look like her and the creepy music teacher?"
* Rewriting the Sentence: "It looked like she was with the creepy music teacher."
The best way to correct the sentence depends on the intended meaning.