Happy Birthday Jayden James and Sean Preston Federline!

Britney Spears' boys are growing up fast!

On Monday, Jayden James Federline turns 5; his brother, Sean Preston, turns 6 on Wednesday. (The boys' father is Spears' ex-hubby Kevin Federline.) 

Sean Preston and Jayden are frequently seen with their pop star mom, 29, and her boyfriend Jason Trawick.

In an interview with PopJustice.com last month, Spears said despite her booming career, her boys remain her top priority. "I'm very strong in the way I raise my kids and stuff," she said. "So [even if I weren't famous] it would probably be pretty much the same."

But Jayden and Sean Preston don't really grasp their mom's status as a superstar. "They're really confused with 'mommy the star' and mommy," Spears told Entertainment Tonight in June. "[When they see me on stage] they're like, 'Is that Britney Spears or is that you, Mommy?'"