As expected, Britney Spears’ “Hold It Against Me” debuts at No. 1 on the Billboard Hot 100 singles chart. This isn’t the first time she’s accomplished that feat: Her 2009 smash “3” debuted on top as well. Mariah Carey, whose “Fantasy,” “One Sweet Day,” and “Honey” all debuted at the apex, is the only other artist who shares that distinction.

Check out the rest of the top 10 list after the jump.

Jan. 20, 2011′s Billboard hot 100 singles top 10:

No. 1 – Britney Spears, “Hold It Against Me”

No. 2 – Bruno Mars, “Grenade”

No. 3 – Katy Perry, “Firework”

No. 4 – Rihanna, “What’s My Name?”

No. 5 – Wiz Khalifa, “Black and Yellow”

No. 6 – Enrique Iglesias, “Tonight (I’m Lovin’ You)”

No. 7 – Ke$ha, “We R Who We R”

No. 8 – P!nk, “Raise Your Glass”

No. 9 – Black Eyed Peas, “The Time (Dirty Bit)”

No. 10 – Bruno Mars, “Just the Way You Are”

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