RACING TO THE ALTAR

Battle of the brides-to-be! With back-to-back engagements (Affleck, 49, popped the question to Lopez, 52, in April), Garner and Lopez are both set to walk down the aisle soon. But who will say “I do” first? One source tells Us Lopez and Affleck are still very much in the planning stages. “Jen goes back and forth on wanting a big or a small wedding,” explains the source. “One day she wants it to be private and intimate, and the next she wants a huge blowout. They’ll likely meet somewhere in the middle.” Another source says Garner isn’t concerned with her ex’s timeline. “Ben and J.Lo’s engagement had nothing to do with hers,” the source notes. “Jen’s happy to see Ben settled down, and their kids matter more than anything.”