K-On!!, Love Live! School Idol Project Recommendations
-Both involve music even if for different reasons
-Main characters are all females
-They are all slice of life genres
These anime are both about girls singing.
Both have the girls eating cakes instead of trying harder.
Both have amazing characters.
Both have great singers involved!
Both involve girls (in all-girl schools) who decide to form a band/group. Though, Love Live! School Idol Project takes on a bit of an interesting twist.