Best thing to do is to go through my playlists and see which Female Artists have the most plays.
Sia (Titanium is the only one though)
Foxes (Clarity is most of them, but I really do like her other songs like Let Go For Tonight and Holding on to Heaven)
Then a big gap, which only included Loreen from Eurovision, and a few more featured female singers such as Max Marshall on Matrix and Futurebound's Control and Ms Dynamite on Dibby Dibby Sound.
Ah, there we go
Katy Perry (Songs are a bit hit and miss, but some like Firework, Dark Horse and Waking up in Vegas are absolute tunes!)
Kesha (WTF? Oh wait, Timber. About the only song where she sings a note and actually hits it! Apart from that, all of Kesha's songs are utter train wrecks)
Rihanna (We Found Love is about it)
Leona Lewis (Some songs aren't too bad - Collide aka Pastor Maldonando's theme tune is the highlight, mainly because of Avicii though...)
Lana Del Rey? (Only the Cedric Gervais remix of Summertime Sadness. All of her normal songs are dreary)
Keisza (Only added recently to the playlist, so hasn't had time to catch the top songs.)
...
Turns out I need to recategorise.
Female acts I like on their own.
Foxes
Katy Perry
Loreen
Fergie (As part of the Black Eyed Peas)
Alana Watson (As part of Nero)
Keisza
Pixie Lott
Jess Glynne (In this category, but quite low compared to the others)
Ellie Goulding
Female acts I like because they were a featured artist on, or featured, another act I liked to make a good song, usually just one song in my playlist.
Sia
Kesha
Rihanna
Leona Lewis
Lana Del Rey
Nicki Minaj (Hit and Miss, there are some good ones such as Superbass and Turn Me On, but I'll put here in this category)
Jessie J (Not a fan at all, but David Guetta's help on Laserlight does mean she is in my playlist)
Counting my whole playlist though, the ratio of Male to Female acts for me is around 13:1
There is nothing sexist about it for me, that's just the songs I like. Titanium and Clarity are both in my top 10 songs, but again, male producer - female vocals. Loreen's Euphoria is my most liked song with just a female artist named.