Stargazing: Time to Know ~ Be Waltz - Seatbelts feat. Takahashi Hideyuki
Very few people in the anime fandom don't know of masterful composer and instrumentalist Kanno Yoko. Her contributions to anime soundtracks have been so substantial, but one of her best known works is with Cowboy Bebop.
Today's song actually comes from the movie, which took the original series' quirky cast and put them in a brand new refreshing atmosphere. The entirety of the soundtrack was memorable, but today's blend of jazz and light rap is the cream of the crop for me.