Sweet Refrain

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"Sweet Refrain"
Single by Perfume
from the album Cosmic Explorer
B-side	"Koi wa Zenkei Shisei"
Released	November 27, 2013 (2013-11-27)
Recorded	2013
Genre	Dance-pop dubstep
Length	4:53
Label	Universal J
Songwriter(s)	Yasutaka Nakata
Producer(s)	Yasutaka Nakata
Perfume singles chronology
"Magic of Love" (2013) "Sweet Refrain" (2013) "Cling Cling" (2014)
Music video
"Sweet Refrain" on YouTube

"Sweet Refrain" is a song by Japanese girl group Perfume, the first single released for their fifth studio album Cosmic Explorer. The song was produced and written by longtime collaborator Yasutaka Nakata. Unlike the group's previous efforts, the song introduces different elements of dance-pop and dubstep. The single was released both physically and digitally on November 27, 2013.