The singer spends another week at number one with her Calvin Harris hook-up 'We Found Love'.
Professor Green and Emeli Sandé enter at number two with 'Read All About It', while Christina Perri slips a place to three with 'Jar Of Hearts'.
LMFAO sit at four with 'Sexy And I Know It' and Maroon 5's collaboration with Christina Aguilera 'Moves Like Jagger' rounds off the top five.
Lana Del Rey climbs four places to nine with 'Video Games', Cobra Starship land at 12 with 'You Make Me Feel...' and Labrinth's 'Earthquake' debuts at 17.
Ed Sheeran's 'Lego House' sits at 19 after the accompanying music video debuted, and Adele's 'Set Fire To The Rain' remains at 28.
Jason Derulo tumbles 17 places down to 32 with 'It Girl' and Justin Bieber falls 22 positions to 38 with festive cut 'Mistletoe'.
This week's Irish Top 10 is as follows:
1. (1) Rihanna ft. Calvin Harris: 'We Found Love'
2. (-) Professor Green ft. Emeli Sandé: 'Read All About It'
3. (2) Christina Perri: 'Jar Of Hearts'
4. (6) LMFAO: "Sexy And I Know It'
5. (3) Maroon 5 ft. Christina Aguilera: 'Moves Like Jagger'
6. (8) David Guetta ft. Sia: 'Titanium'
7. (7) Gym Class Heroes ft. Adam Levine: 'Stereo Hearts'
8. (4) One Direction: 'What Makes You Beautiful'
9. (13) Lana Del Rey: 'Video Games'
10. (10) Ed Sheeran: 'The A Team'
Watch the music video for Rihanna's 'We Found Love' below: