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

01 of 06

WATER BABIES

WATER BABIES
Ramey

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.

02 of 06

PARISIAN PALS

PARISIAN PALS
Bauer-Griffin

Bonjour, birthday boys! Sean and Jayden get a little wind in their hair – and spring in their steps – while in Paris on July 7. Would the boys ever follow mom's footsteps into show business? It's possible! The brothers created quite a stir when they showed off some stellar dance moves set to Spears's hit "Toxic" earlier this summer.

03 of 06

DADDY DAY CARE

DADDY DAY CARE
KCSPresse / Splash News Online

Proud papa Kevin Federline treats his boys to some frozen sweets – and later a carousel ride – during a stroll through Paris on July 5. While the boys may look up to dad, they don't necessarily take after him, at least physically. "They don't look like their father at all," Spears quipped to Rolling Stone in November.

04 of 06

SHADY CHARACTERS

SHADY CHARACTERS
GSI Media

Looking way too cool for school, Sean and Jayden enjoy a boat ride with mom on June 30 in Marina del Rey, Calif. Spears says her boys have a close bond, sharing that "since they're almost like twins, they both take care of each other."

05 of 06

DISNEY DUDES

DISNEY DUDES
Diana Zalucky/Disney

Say cheese! Sean and Jayden join mom for a day of fun on March 5 at Disney World's Magic Kingdom theme park in Lake Buena Vista, Fla. Think Spears – who starred on the Mickey Mouse Club when she was younger – had an 'in' with the big mouse?

06 of 06

ALL DRESSED UP

ALL DRESSED UP
Courtesy BritneySpears.com

Spears and her dapper little guys strike a pose before uncle Bryan Spears's New Year's Eve wedding in New Orleans, La. "They're such special people," the singer says of her sons. "They're so smart yet so innocent."

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