Now that we know that Taylor's 2 biggest hits are bigger than anything released by Gaga or Katy, I'd like to see how Rihanna, Adele, Beyonce, Pink, Kesha, Carrie and Britney compare. Although that could be embarrassing for a few of them.
Top 10:
1. Irreplaceable - 8.861
2. You Belong With Me - 8.788
3. Love Story - 7.847
4. Since U Been Gone - 7.637
5. Beautiful - 7.601
6. Because Of You - 7.556
7. Breakaway - 7.530
8. We Found Love - 7.346
9. Just Dance - 7.076
10. Hot N Cold - 6.815
Not surprised to see YBWM/Irreplaceable up there at top. They are major crossover hits with great recurrent airplay. Mariah is even higher with over 9 billion audience impressions for WBT (for the same reasons mentioned in the last sentence).
Top 10:
1. Irreplaceable - 8.861
2. You Belong With Me - 8.788
3. Love Story - 7.847
4. Since U Been Gone - 7.637
5. Beautiful - 7.601
6. Because Of You - 7.556
7. Breakaway - 7.530
8. We Found Love - 7.346
9. Just Dance - 7.076
10. Hot N Cold - 6.815
To be fair, all those songs, besides We Found Love, are pretty old.