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Britney's finally explained her reasoning for driving with Sean Preston on her lap β€” and we're of the opinion it's not helping her case. In an interview with the NBC Today show yesterday, here's what she had to say:

"When I was a kid, I'd sit on my dad's lap. We're country. I'm a good mom..."

Oh yeah...

...Ma and Pa Spears may have let her ride in the back of a pickup out on the farm β€” but when the kid is like, zero years old and you've got the Feder-spawn bouncin' up and down on your lap while you're riding down on the PCH with paparazzi whizzing by β€” that's just an accident waiting to happen. Kinda like Britney.

Britney tears at car blast [The Sun Online]

Britney Spears' Baby Buggy Blunder β€” Not Illegal, But Still Dumb As Federline; 'American Inventor' Winner's First Baby Buggy Bubble Sale β€” Britney Spears?; Britney Spears Has A New Ride: The Porsche Speedster [internal]