"Us" is a song by Regina Spektor, a Russian-American singer-songwriter. It was released in 2004 as part of her album "Soviet Kitsch" in the key of F major. Regina Spektor herself composed and performed the song. "Us" gained popularity for its catchy melody and distinct vocal stylings. Notable trivia about the song includes its appearance in the soundtracks of the films "500 Days of Summer" and "The Chronicles of Narnia: Prince Caspian." The melody of "Us" is characterized by a playful piano arrangement that intertwines with Spektor's unique vocal range, creating a whimsical and enchanting atmosphere.