Complex sentence: Again they used the concept of male and female vocals, it was the fifth single released from their album (Slave To The Music) and did not enter the UK charts, this time they didn't use any raps.
Split into simpler sentences: Again they used the concept of male and female vocals, it was the fifth single released from their album (Slave To The Music). The single was not released in the UK, and this time they didn't use any raps.