7 of the 10 most followed people on Twitter are women

"# Name (Screen Name) Followers
1. Lady Gaga (ladygaga) 15,117,972
2. Justin Bieber (justinbieber) 13,868,314
3. Katy Perry (katyperry) 11,511,972
4. Barack Obama (BarackObama) 10,872,247
5. Kim Kardashian (KimKardashian) 10,735,244
6. Britney Spears (britneyspears) 10,662,045
7. Shakira (shakira) 9,802,132
8. Rihanna (rihanna) 9,055,660
9. taylorswift13 (taylorswift13) 8,759,295
10. ashton kutcher (aplusk) 8,028,802"
Source:  Retrieved from Twitaholic, 31st October 2011