The best red carpet accessory last night: An adorable baby!

Rachel Zoe and husband Rodger Berman showed off their incredibly cute and stylish newborn son, Sklyer (left), at a Petit Tresor/CoCaLo party in West Hollywood.

The other big baby event last night was the Pampers 50th birthday celebration in New York -- where James Van Der Beek, Drew Lachey, Jets player Shonn Greene and Ali Landry all posed with their kids.

Check out the red carpet shots -- and, just because they're so cute, also see what Matthew McConaughey and Jennifer Lopez were doing with their children in the gallery as well!