1. Roar - Katy Perry

Robin Thicke's "Blurred Lines" lines has finally been dethroned; its 12 week stay cut short as Katy Perry's latest single "Roar" climbs a notch up to #1, landing her eighth chart-topper--moving an impressive 448k units this week, matched with 21 million streams and almost 100 million audience impressions. Perry is now the sixth female artist with the most number-ones on the Hot 100--trailing Mariah Carey (18), Madonna and Rihanna (12 a piece), Whitney Houston (11) and Janet Jackson (10).

3. Bezerk - Eminem

The lead single, "Bezerk" from Emiem's forthcoming eighth studio album  The Marshall Mathers LP, debuts at #3, landing the rapper his fifteen top ten single. According to Billboard, this is Eminem's tenth top ten debut--tying Lil' Wayne as the rapper with the most top ten debuts.

6. Applause - Lady Gaga

It's a little odd seeing a new Gaga single performing so moderately on the charts. This week her latest single, "Applause" slips two spots down to #6.

8. Royals - Lorde

New Zealand singer/songwriter Lorde scores her first US top ten single with, "Royals." It moves four spots up to #8.