I got 100 on the TOEFL ibt, Grades average of B, almost 3 years of experience for Law firm and French corporation.

Can I get in at a top 20 University in the US?

Anyone in the same situation?

I just have friend admited to Columbia and Georgetown, he applied early somewhere between october 10 and november 4.

Of course you can,

To enter those Universities you will need more than grades and professional experience, you will need to convince them that you worth a lot not only as a student or professional, but as a person also.

You have great chances; just work hard in your personal statement, interviews, etc.

Counsel is right. It also helps of course, that you have some strong recommendations! Maybe from former alumnae of the schools you're looking at.