Here is Summer Rain smiling proudly up at her mama!
Now here’s Summer grinning alongside Xtina as she performs!
And here’s Summer practicing her rhythm behind the drum kit!
Emma McIntyre/Getty Images
In every picture she looks overjoyed (and maybe slightly overwhelmed) to be there.
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Happy 9th birthday to our sweet Summer Rain, Aguilera began in her long heartfelt caption.
Today I find myself reflecting on how fast time has gone by.
Mommy loves you so much!
Christina Aguilera alsohas one other child, a son Max with ex-husband Jordan Bratman.
Its a beautiful thing.