The Everly Brothers' song "This Little Girl of Mine" is a love song about the narrator's affection and admiration for a particular girl. The lyrics depict the narrator expressing their love for this girl, who brings happiness to their life even in difficult times. The girl is described as someone who loves unconditionally, even when the narrator behaves badly. The song also highlights the girl's attention to details, as she knows how to dress impeccably and captivates people's attention, as seen when she stops traffic on the street. Additionally, the lyrics mention a specific incident where the girl called the narrator and arrived punctually for their date, emphasizing her reliability. Overall, the song conveys the narrator's deep affection and appreciation for this special girl, emphasizing her positive impact on their life and the love they feel for her.