Airplanes (2010) debuted at #23 and hit #1 six weeks later.
Only Girl (In the World) (2010) debuted at #2 and hit #1 the week after.
Someone Like You (2011) debuted upon the album release at #36
Dance With Me Tonight (2011) debuted at #2.
Domino (2012) debuted at #54 upon the release of the platinum edition (whilst the song was already a single in the US)
Paradise (2012) debuted at #14.
Scream and Shout (2013) debuted at #2.
There's quite a few but the majority of them nowadays debut at #1 and hope the peak position will help to sustain longevity. Hence the reason for radio build up