AHAHAHAHA!
This is too funny. It's based on biorhythms.

Your best matches

Oded Fehr 97%
Jonathan Rhys Meyers 96%
Ralf Schumacher 95%
Tobey Maguire 95%
Justin Timberlake 95%

and because I was curious:

Chris Kirkpatrick 65% (100% intellectual compatibility)
Lance Bass 57%
JC Chasez 54%
Joey Fatone 35%

click here to find your celebrity matches.
gacked from strippedhalo (and various other people, but that's where I followed the link)