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15 April 2012, 19:32
The 'Call Me Maybe' singer is spending another week at number one with her debut UK single.
Carly Rae Jepsen has retained her lead position on the Vodafone Big Top 40 for the second weekend in a row.
In second place this weekend is John Legend's 2005 hit single 'Ordinary People', which has reemerged on the Big Top 40 after being performed by two contestants on this week's episode of BBC One talent series The Voice UK.
US rockers Fun. fall to third place with their worldwide smash 'We Are Young', while 19 year-old singer-songwriter Conor Maynard enters at number four with his debut single 'Can't Say No'.
Rounding out the top five songs of the week is another new entry from Jessie J with her David Guetta collaborations 'LaserLight'.
The Vodafone Big Top 40 with Rich and Kat airs every Sunday from 4-7pm.
Check out the full top ten on this week's Vodafone Big Top 40 below.