From
http://www.aap.org/family/carseatguide.htm
"All infants should ride rear-facing until they have reached at least 1 year of age and weigh at least 20 pounds. That means that if your baby reaches 20 pounds before her first birthday, she should remain rear-facing until she turns 1."
So I was wrong with what I said earlier. And Britney is not in the clear.