Here are the stats so far...
Azealia Banks: 1/6
Beach House: 4/12
Best Coast: 0/6
Cults: 0/3
EMA: 2/5
Janelle Monae: 1/9
Karmin: 2/2
Lana Del Rey: 4/5
Santigold: 1/10
Sharon Van Etten: 1/5
Sky Ferreira: 0/4
Sleigh Bells: 0/7
St. Vincent: 0/9
Tennis: 2/6
tUnE-yArDs: 1/5
So, Best Coast, Cults, Sky Ferreira, Sleigh Bells and St. Vincent are the only artists with all songs in the top 75.