Taylor Swift print dress heels kennedy red dress red lips

Taylor Swift went solo back to her NYC hotel Thursday night ... leaving her 18-year-old boyfriend Connor Kennedy at home in Massachusetts.

The country/pop star looked amazing in a a red and white dress with bright red lipstick and heels to match ... Connor's a lucky kid!

Taylor stopped by MTV yesterday to debut the music video for her new single "We Are Never Ever Getting Back Together." It's a good one! Check it out tonight, after 8pm, after the jump. In the meantime, here are a couple scenes from the clip about a mysterious ex-boyfriend Taylor will NEVER date again ... who could it be?