What is the song that has the girl blowing the trumpet?

The song you're referring to is likely "The Girl Who Played with Fire" by The Proclaimers, which features a memorable Trumpet section. Another possibility is "The Lonely Goatherd" from the musical "The Sound of Music," which includes a scene with a girl playing a trumpet. If you have more details about the song or its context, I could provide a more accurate answer!