Massive Amounts of Celebrity Babies Hang Out

Romeo Beckham - son of David and Victoria Beckham, natch - celebrated a big 6th birthday at Universal Studios on Thursday afternoon.

The party featured Romeo's siblings, Heidi Klum and her children with Seal, along with Gavin Rossdale and his son, Kingston Rossdale.

That's a lot of good genes - and celebrity babies that were spawned from them - in one place, people. Here's a photo of the outing ...