According to Kworb, estimates of how much previous years big hits sold:
20122012
Titanium: 160k
Set Fire to the Rain: 100k
I Won't Give Up: 100k
Skyfall: 80k
Somebody That I Used to Know: 70k
Ho Hey: 70k
Locked Out of Heaven: 60k
Diamonds: 60k
What Makes You Beautiful: 60k
One More Night: 50k
Red: 10k
missing (probably sold less than 10k): #1 hits Sexy And I Know It, We Are Young, Call Me Maybe, WANEGBT, Whiste, Stronger and Part Of Me and big hits such as Payphone and Gangnam Style
2013
2013
Roar: 130k
Radioactive: 130k
Demons: 120k
Cruise: 110k
Rap God: 100k
Wake Me Up: 90k
When I Was Your Man: 80k
Stay: 80k
Can't Hold Us: 80k
Story of My Life: 80k
Mirrors: 70k
Say Something: 70k
Just Give Me A Reason: 70k
I Knew You Were Trouble: 70k
Hold On, We're Going Home: 70k
Royals: 70k
poor sales: Thrift Shop 30k, We Can't Stop 20k, Blurred Lines 10k, Best Song Ever and Harlem Shake >10k
2014
2014
Shake it Off: 250k
Chandelier: 230k
All of Me: 190k
Drink You Away: 190k
Happy: 180k
All About That Bass: 170k
Blank Space: 150k
Bang Bang: 130k
Counting Stars: 120k
Turn Down For What: 110k
Take Me To Church: 100k
Let Her Go: 100k
Dark Horse: 90k
Stay With Me: 90k
Timber: 90k
I'm Not The Only One: 80k
Let it Go: 70k
Drunk in Love: 70k
Pompeii: 70k
Animals: 70k
poor sales: Talk Dirty 50k, Problem 50k, Wiggle 40k, Rude 40k, Fancy 30k, Am I Wrong 30k, Habits 30k, Black Widow 20k, Anaconda 10k
2015
2015
Hello: 1.070M
Stitches: 570k
Ex's & Oh's: 540k
Uptown Funk : 520k
Like I'm Gonna Lose You: 520k
Fight Song: 510k
Hotline Bling: 450k
679: 430k
What Do You Mean?: 430k
The Hills: 390k
Thinking Out Loud: 370k
Shut Up And Dance: 360k
See You Again: 350k
Can't Feel My Face: 330k
Wildest Dreams: 300k
Trap Queen: 280k
Watch Me: 280k
Photograph: 240k
Drag Me Down: 230k
Sugar: 230k
Lean On: 210k
Bad Blood: 200k
^^some of these were still smashing in early 2016
the rest of the top10 hits sold less than 200k
Other big old sellers:
Lose Yourself: 240k
Rolling in the Deep: 160k
Viva La Vida: 160k
Yeah!: 150k
Someone Like You: 140k
'Till I Collapse: 120k
Just the Way You Are: 100k
Love the Way You Lie: 100k
Count On Me: 90k
Firework: 90k
Low: 90k
Fix You: 90k
Marry You: 80k
I Gotta Feeling: 80k
Not Afraid: 80k
Moves Like Jagger: 80k
How to Save a Life: 80k
Drops of Jupiter: 70k
The Scientist: 70k
Grenade: 60k
Pumped Up Kicks: 60k
Numb: 60k
In the End: 50k
Xmas #1 this year please 
