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

DADDY DAY CARE

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.