In "Drivers License," Olivia Rodrigo references "that blonde girl" as part of the narrative about heartbreak and jealousy. The song explores feelings of betrayal and longing after a breakup, and the mention of the blonde girl signifies the new relationship of her ex, heightening the emotional impact. This detail connects to the broader themes of love, loss, and the pain of seeing someone move on, making it a pivotal moment in the song's storytelling.