Pregnant Jana Kramer shows off her baby bump in a yellow bikini as she celebrates Fourth of July

Karlie Kloss bares baby bump and spends quality time with son Levi, two, on Fourth Of July

Serena Williams proudly shows off her bare baby bump in crop top during intense workout

Kourtney Kardashian Shows Off Baby Bump In Pink Bikini As She Twins With Addison Rae: Photos