With "Roar debuting at #1 on the official New Zealand charts, Katy overtakes Michael Jackson and U2 to be the second artist with the most number-one hits. The Beatles hold the record for most number-one hits with 15.
Artists with the most number-one hits
1. The Beatles (15)
2. Katy Perry (9)
3. Michael Jackson (8) (tie)
3. U2 (8) (tie)
5. Akon (7) (tie)
5. Mariah Carey (7) (tie)
7. Eminem (6) (tie)
7. ABBA (6) (tie)
7. The Black Eyed Peas (6) (tie)
7. Chris Brown (6) (tie)
7. Rihanna (6) (tie)
