Complex sentence: "Pretty Girl Rock" is a song by American R&B recording artist Keri Hilson, released from her second studio album, "No Boys Allowed", as the lead single internationally, and was the second single from that album released in the United States.
Split into simpler sentences: Pretty Girl Rock is a song by American R&B recording artist Keri Hilson, taken from her second studio album, "No Boys Allowed". It was released as the lead single internationally, and was the second single from that album released in the United States.