Listen to An Upbeat Party online. An Upbeat Party is an Instrumental language song and is sung by Bitter Sweet Jazz Band. An Upbeat Party, from the album Mellow Jazz Nappy Moods:まったりお昼寝BGM - Coffee and Reflections, was released in the year 2022. The duration of the song is 1:38. Download Instrumental songs online from JioSaavn.