"Un Show" (A Show) by Estelares is the story of one night after a gig. It starts with love at first sight: "Conocí una chica más hermosa que el sol" (I met a girl more beautiful than the sun), and she had "los ojos rojos, rojos de amor" (red, red eyes from love). The best detail is how they meet: "Se rió al ver mi ropa y me conmovió" (She laughed when she saw my clothes and it moved me). Being laughed at is apparently the start of something.
Around them, the night is chaos. Lots of people are talking to him, his friends are laughing, and "todo el mundo está cayendo, bebiendo y demás" (everyone is falling over, drinking and so on). It should be "otra de esas noches clásicas para olvidar" (another one of those classic nights to forget), except she is incredible and "algo va a explotar" (something is going to explode). The chorus is a sweet joke: "me convierto en su souvenir" (I become her souvenir), the thing she takes home from the show. She drags him to the garden, kisses him there, and he makes a deal: "Sólo me iré con vos si me escribes una canción" (I'll only leave with you if you write me a song) about how he stole her love.
Learner tip: vos is the "you" used in Argentina and Uruguay instead of tú, so me iré con vos is "I'll leave with you".