How come "out" was used here? What't the difference of saying "I saw her on Friday night"?
Native speaker’s answer
Rebecca
This is just speculation, but the Vamps may have used "I saw her out on Friday night" because they liked the lyrics better than "I saw her on Friday night." Both have similar meanings, but it is up to artistic style of the song writer, rather than grammatical accuracy or what is commonly used. Thank you for your question!