Complex sentence: "Girlfriend" featuring the Korean artist BoA, with whom Kay is close friends with, is to be used as the image song for the Japanese dub of "He's Just Not That into You" starring Jennifer Aniston and Ben Affleck.
Split into simpler sentences: Girlfriend features the Korean artist BoA, with whom Kay is close friends with. It is to be used as the image song for the Japanese dub of "He's Just Not That into You" starring Jennifer Aniston and Ben Affleck.