Happy Birthday Sean Preston & Jayden James!

Britney and Kevin's little guys – 3 and 4 this weekend – are growing up! See how these blonde babes have spent the last year

Credit: Ramey

Updated: Saturday Sep 12, 2009 | 02:00 PM EDT By: Kate Hogan

WATER BABIES

Splish-splash! Jayden James, turning 3 on Saturday, and big bro Sean Preston, turning 4 on Monday, don their too-cool hats and water wings for a trip to the pool with mom Britney Spears on Aug. 16. The trio was relaxing at the Ritz-Carlton hotel in Marina del Rey, Calif., before the second leg of Spears's "Circus" tour began.