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They grow up so fast!
Christina Aguilera took to Instagram on Sunday to wish her and fiancé Matthew Rutler's baby girl Summer Rain a happy first birthday.
The adorable pic shows their little girl in a cute pink outfit. "Happy 1st birthday! My sweet, Summer Rain," the 34-year-old singer captioned the sweet B-day snapshot. How gorgeous are Summer's bright blue eyes?!
Rutler also tweeted a daddy-daughter photo with the message, "You light up life. Happy First Birthday, Summer." Too darn cute.