The former Canadian Idol finalist sold almost another 100,000 copies to take its tally to 434,000. It has now risen to be the seventh best-selling track of the year so far.
Calvin Harris achieved the highest and only new entry this week with his Ne-Yo collaboration 'Let's Go', which enters in second place.
fun. are a non-mover at three with 'We Are Young', while Conor Maynard slips two to four with 'Can't Say No'. Jessie J and David Guetta complete the top five with 'LaserLight', which holds steady at five.
Alex Clare climbs an impressive ten places to six with 'Too Close' after its appearance in a recent Internet Explorer TV advert.
The Voice UK continued its recent influence on the chart with the former Stereophonics number one 'Dakota' climbing to 29 and Kings of Leon's 'Use Somebody' entering at 35.
Meanwhile, The Fray saw a re-entry of their biggest hit 'How To Save a Life' climbing back up to 34.
Train achieved their first UK top ten hit since 2001's 'Drops of Jupiter', with 'Drive By' climbing up to ten.
Watch the video for Carly Rae Jepsen's 'Call Me Maybe' below:
Source: Official Charts Company
> This week's albums chart