Girlfriend by Alicia Keys is a song about the insecurities and doubts in a romantic relationship caused by feelings of jealousy and mistrust. Alicia keys expresses her fears that her boyfriend may still have feelings for his ex-girlfriend, causing her to question his loyalty and the stability of their relationship. The key themes of the song include jealousy, insecurity, and the complexities of trust within a relationship. One poignant moment in the song is when Alicia Keys admits that her doubts might stem from her own insecurities rather than any actual wrongdoing by her partner, highlighting the internal struggles she faces.