Girls Girls is a song that is performed by Starfire, Raven, Cyborg, and Beast Boy in "Boys vs. Girls", after Robin and the rest of the boys lost all the competition tests against the girls. Cyborg and Beast Boy both explain how girls are better to Robin, and they end up singing.
Starfire, Raven, Cyborg, and Beast Boy:
GIRLS, GIRLS, GIRLS, GIRLS!
Everyone (excluding Robin):
This is a remix to the original song, Boys Boys, featured at the start of the episode.