One In A Billion

 is a collaboration single by May'n × Wake Up, Girls!.

CD

 * 1) One In A Billion
 * 2) Ousama no Cadenza (王様のカデンツァ)
 * 3) One In A Billion (Inst)
 * 4) Ousama no Cadenza (王様のカデンツァ) (Inst)

Limited Edition BR

 * 1) One In A Billion (Music Video)
 * 2) One In A Billion (Dance Video)