The crossword solutions for the term 'THEY'RE ALL IN YOUR HEAD' are IDEAS (5 letters) and EYES (4 letters). This phrase is often used to describe something that is imaginary or not real, and it can be interpreted in different ways. The two words IDEAS and EYES represent the two sides of this phrase: IDEAS referring to the thoughts and IDEAS that are in one's head, and EYES referring to the visualizations that one can have in their mind.