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Image Credit: Larry Busacca/Getty ImagesNot much changed this week onBillboards Hot 100 chart, and were sureRihannaloves that.

For its fourth week straight, her Rude Boy is No.

Image

Credit: Larry Busacca/Getty Images

And again, B.o.Bs Nothin On You rests at No.

3 and Lady Gaga and Beyonces Telephone is still ringing in at No.

Returning to the top 10 this week,Jason Derulos In My Head climbed from No.

Meanwhile,Ushers having a stellar week.

After finding out his new albumRaymond v. Raymondis the No.

1 album in the countryyesterday, today his OMG debuts at No.

Its the third-best debut single of his career.

(In 1997 his Nice & Slow debuted at No.

9 and in 1998 My Way debuted at No.

Again we ask, who is going to knock Rihanna out of the No.

Think Usher can pull it off?

Or is it time for B.oB.

Let us know what you think.

More from EW.comsMusic Mix:

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