Spears Celebrates 20th With Daughter

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April 4, 2011 | 8:45pm EST

Britney Spears’ little sister celebrated turning 20 on Monday by posting a sweet photo of herself and three-year-old daughter Maddie on Twitter.com
Jamie Lynn Spears started her day in style when her daughter’s pre-school class sang Happy Birthday to her.

In her Twitter post, she wrote, “Goodbye teens.., HELLO 20’s!!! Just got serenaded by Maddie’s preschool class – no present will top that!!!”