I took the most viewed music videos on YouTube and compared them to certifications and sales of songs. Take a look, some are surprising.
I bolded the ones that had relatively low sales compared to views.
Gangnam Style - PSY (2.1 billion views) [5x platinum - 5,000,000 downloads]
Baby - Justin Bieber (feat. Ludacris) - (1.1 billion views) [12x Platinum - 3,900,000 downloads]
On The Floor - Jennifer Lopez (feat. Pitbull) - (800 mill views) [3x platinum, 3,800,000 downloads]
Party Rock Anthem - LMFAO (773 mill views) [8x platinum - 8,000,000 downloads]
Waka Waka (This Time For Africa) - Shakira (770 mill views) [Platinum - 1,763,000 downloads]
Love The Way You lie - Eminem (feat. Rihanna) (767 mill views) [11x platinum - 6,000,000 downloads]
Gentleman - PSY (756 mill views) [Gold?]
Wrecking Ball - Miley Cyrus (723 mill views) [4x platinum - 4,000,000 downloads]
Roar - Katy Perry (698 mill views) [6x platinum - 5,800,000 downloads]
Dark Horse - Katy Perry (feat. Juicy J) - (683 mill views) [6x platinum - 5,420,000 downloads]
Call Me Maybe - Carly Rae Jepsen - (610 mill views) [8x platinum - 7,223,000 downloads]
Bad Romance - Lady Gaga - (606 mill views) [Diamond - 5,503,000 downloads]
Thrift Shop - Macklemore & Ryan Lewis (606 mill views) [7x platinum - 7,266,000 downloads]
What Makes You Beautiful - One Direction (574 mill views) [4x platinum - 4,525,000 downloads]
Somebody That I Used to Know - Gotye (feat. Kimbra) - (570 mill views) [8x platinum 7,640,000 downloads]
Rolling in the Deep - Adele (567 mill views) [8x platinum - 8,000,000 downloads]
The Lazy Song - Bruno Mars (564 mill views) [3x platinum - 3,500,000 downloads]