<Dd> 1 . Adele--"Hello" (1,112,000) November 14, 2015 </Dd> <Dd> 2 . Flo Rida--"Right Round" (636,000) February 28, 2009 </Dd> <Dd> 3 . Adele--"Hello" (635,000) November 21, 2015 </Dd> <Dd> 4 . Taylor Swift--"We Are Never Ever Getting Back Together" (623,000) September 1, 2012 </Dd>

Fastest song to reach number 1 on us itunes