Jennifer Lopez and Ben Affleck are nailing this whole ex thing. Fans went into a frenzy last week when the Gigli co-stars reunited after their whirlwind marriage came crashing down last year. In case you didn't hear, Ben and Jen caught up on the red carpet premiere of J.Lo's new movie Kiss of the Spider Woman, and they looked VERY friendly! We mean, look at the material: View this post on Instagram A post shared by Us Weekly (@usweekly) Related: Orlando Bloom Having NO LUCK Dating After Katy Perry Breakup Ben even took a moment to positively rave about his ex-wife's performance in the musical,...