Listed are the fastest-selling digital songs per million mark and the runners-up up to fifth place.
1 million
Flo Rida - Right Round (2 weeks)
Katy Perry - Roar (3 weeks)
Lady Gaga - Born This Way (3 weeks)
Taylor Swift - Shake It Off (3 weeks)
Taylor Swift - We Are Never Ever Getting Back Together (3 weeks)
2 million
Flo Rida - Right Round (5 weeks)
Katy Perry - Roar (5 weeks)
Eminem featuring Rihanna - Love The Way You Lie (7 weeks)
Katy Perry featuring Snoop Dogg - California Gurls (7 weeks)
Maroon 5 featuring Wiz Khalifa - Payphone (7 weeks)
Taylor Swift - We Are Never Ever Getting Back Together (7 weeks)
3 million
Katy Perry - Roar (9 weeks)
Eminem featuring Rihanna - Love The Way You Lie (11 weeks)
Flo Rida - Right Round (11 weeks)
Katy Perry featuring Snoop Dogg - California Gurls (11 weeks)
Maroon 5 featuring Wiz Khalifa - Payphone (11 weeks)
4 million
Katy Perry - Roar (17 weeks)
Katy Perry featuring Kanye West - E.T. (18 weeks)
Carly Rae Jepsen - Call Me Maybe (19 weeks)
Gotye featuring Kimbra - Somebody That I Used To Know (19 weeks)
Maroon 5 featuring Wiz Khalifa - Payphone (19 weeks)
5 million
Robin Thicke featuring Pharrell & T.I. - Blurred Lines (22 weeks)
Gotye featuring Kimbra - Somebody That I Used To Know (23 weeks)
Carly Rae Jepsen - Call Me Maybe (24 weeks)
Fun. featuring Janelle Monae - We Are Young (28 weeks)
Katy Perry - Roar (28 weeks)
6 million
Robin Thicke featuring Pharrell & T.I. - Blurred Lines (29 weeks)
Gotye featuring Kimbra - Somebody That I Used To Know (30 weeks)
Carly Rae Jepsen - Call Me Maybe (36 weeks)
Macklemore & Ryan Lewis - Thrift Shop (36 weeks)
LMFAO featuring Lauren Bennett & GoonRock - Party Rock Anthem (48 weeks)
7 million
Macklemore & Ryan Lewis - Thrift Shop (53 weeks)
Gotye featuring Kimbra - Somebody That I Used To Know (56 weeks)
Robin Thicke featuring Pharrell & T.I. - Blurred Lines (56 weeks)
Carly Rae Jepsen - Call Me Maybe (62 weeks)
Adele - Rolling In The Deep (67 weeks)
LMFAO featuring Lauren Bennett & GoonRock - Party Rock Anthem (68 weeks)
8 million
Adele - Rolling In The Deep (2 years, 10 months)
Black Eyed Peas - I Gotta Feeling (3 years, 10 days)
it sold 1,132,000 in its first 2 weeks.