Not only does Lady GaGa have the number one single on the Billboard Hot 100 today, but a few other noteworthy things have happened. MTV named her a Female Pop Rookie of 2009 (well, duh!) and you can read about that here. She also is stepping out of the Pussycat Dolls opening shadow and has now announced her first ever headlining tour in America, where she is headed to Chicago's House of Blues on March 24. Keep up the hard work!