I found these percents on a blog. Not sure if they are true, but some are disappointing.

Best Kiss-

1. Emma Watson and Daniel Radcliffe: 35.5%
2. Kristen Stewart and Robert Pattinson: 32.7%
3. Kristen Stewart and Taylor Lautner: 24.8%

Best Male-

1. Robert Pattinson: 36.7%
2. Daniel Radcliffe: 34.4%
3. Jesse Eisenberg: 11.7%

Best Female-

1. Emma Watson: 40.1%
2. Kristen Stewart: 38.9%
3. Jennifer Aniston: 7.2%

source