The star's international hit 'Call Me Maybe' remains at number one, while fun.'s 'We Are Young' stays put at two.
Gotye advances a place to three with 'Somebody That I Used To Know', Nicki Minaj slips to four with 'Starships' and David Guetta stays put at five with 'Titanium'.
B.o.B claims this week's highest new entry with 'So Good', which debuts at number nine. Justin Bieber falls to 12 with 'Boyfriend' and Alexandra Burke's 'Elephant' zooms back up to 14.
Elsewhere, Beyoncé's 'End Of Time' begins to climb moving up 30 places to number 27 and Wheatus's 'Teenage Dirtbag' vaults from 91 to 29.
Jennifer Lopez lands at 35 with 'Dance Again' and Train manage to re-enter the chart with their hit track 'Drops Of Jupiter' at 39.
This week's Irish Top 10 is as follows:
1. (1) Carly Rae Jepsen: 'Call Me Maybe'
2. (2) fun. feat. Janelle Monaé: 'We Are Young'
3. (4) Gotye feat. Kimbra: 'Somebody That I Used To Know'
4. (3) Nicki Minaj: 'Starships'
5. (5) David Guetta feat. Sia: 'Titanium'
6. (6) Flo Rida feat. Sia: 'Wild Ones'
7. (8) Katy Perry: 'Part of Me'
8. (7) Emeli Sandé: 'Next To Me'
9. (-) B.o.B: 'So Good'
10. (11) Sean Paul: 'She Doesn't Mind'
Watch the music video for Carly Rae Jepsen's 'Call Me Maybe' below: