September 23rd is Celebrate Bisexuality Day. Bisexuals remain the single most curious phenomenon. I’ve argued ad nauseum with many friends about whether or not someone can be a “true” bisexual – does that mean they have to split time equally boning boys and girls? Where’s the scoreboard? Anyway, there’s no arguing our list of the sexiest celebrity bisexuals. To quote Andy Samberg and Justin Timberlake, “it’s okay to put us in a three-way” with any of these ladies. Check ’em out below.