Jayden James Federline britjayden200.jpgIt seems Britney's son Jayden suffered an allergic reaction, according to People.com, but that "they kept him overnight" and "he's doing fine."

Good to hear!

The site's source is unsure what caused the reaction but that he "had hives and was itchy and irritable." The source says Britney and her mom Lynne both spent the night with Jayden.