http://www.last.fm/user/Errrlend/library/music/Rihanna

Only Girl (In the World) 132
S&M 130
Birthday Cake 119
We Found Love (feat. Calvin Harris) 113
What's My Name? 112
Where Have You Been 107
Man Down 96
Roc Me Out 92
Fool in Love 90
Drunk on Love 89

That photoshop is real

From iTunes, since I reset the plays 5 months ago:

1. 'Pon de Replay'
2. 'S&M'
3. 'Rude Boy'
4. 'SOS'
5. 'Take a Bow'
6. 'Only Girl (In the World)'
7. 'Stay'
8. 'No Love Allowed'
9. 'Kisses Don't Lie'
10. 'Hate That I Love You'

Only 2 scrobbles. Stupid in Love & Raining Men (feat. Nicki Minaj). but it's because I created a last fm account recently. If not, Man Down would have been the most played track.

1. Disturbia
2. Russian Roulette
3. Don't Stop The Music
4. G4L
5. Hard
6. Firebomb
7. Rehab
8. Wait Your Turn
9. Te Amo
10. Only Girl (In The World)

I used to obsess over her in 2009-2010, but I've been increasingly less impressed with each passing year since then.

http://www.last.fm/user/sashafierce/.../music/rihanna

1 - We Found Love (feat. Calvin Harris) - 318
2 - Hard (feat. Young Jeezy) - 108
3 - Te Amo - 100
4 - Russian Roulette - 91
5 - Complicated - 81
6 - Wait Your Turn/Firebomb - 69
7 - Who's That Chick - 64
8 - California King Bed - 63
9 - What's My Name (feat. Drake) - 61
10 - Rude Boy - 57

http://www.last.fm/user/Spawwkles/library/music/Rihanna

Birthday Cake
Where Have You Been
Do Ya Thang
We Found Love
Disturbia
S&M
You Da One
Pour It Up
Watch n' Learn
What's My Name

Skin
Pour It Up
Wait Your Turn
Rude Boy
Rockstar 101
G4L
Russian Roulette
Te Amo
Diamonds
Don't Stop the Music

1. We Found Love
2. Take a Bow
3. California King Bed
4. What's My Name?
5. Disturbia
6. Only Girl (In the World)
7. Cockiness (I Love It)
8. You da One
9. We All Want Love
10. Fool In Love

According to itunes.

10. Theres A Thug In My Life - 90 plays I used to STAN.
9. Rude Boy - 91
8. Only Girl - 124
7. Cold Case Love - 140
6. Man Down - 149
5. Stay - 200
4. We Found Love - 245
3. Jump - 400
2. Whats My Name? - 482
1. Birthday Cake (Remix) 534

Russian Roulette
Only Girl
Complicated
Rehab
WHYB

and then the rest are similar in #s.

1. We Found Love 212
2. Where Have You Been 192
3. Push Up on Me 114
4. Only Girl (in the World) 83
5. Who's that Chick? 80
6. Russian Roulette 70
7. What's My Name 70
8. Man Down 67
9. Rude Boy 61
10. Mad House 60

Stay
Rude Boy
We Found Love (feat. Calvin Harris)
Hard
Man Down
Where Have You Been
Cockiness (Love It)
You Da One
Russian Roulette
Jump

1. We Found Love (Feat. Calvin Harris)
2. Only Girl (In The World)
3. Diamonds
4. Where Have You Been
5. S&M
6. You Da One
7. Who's That Chick
8. Breakin' Dishes
9. Man Down
10. Umbrella