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Christina shared an adorable snap to celebrate her daughter’s birthdayCredit: Christina Aguilera/Instagram
Christina, 40, shared a photo and video with her 7.6million Instagram followers, writing next to it: “We’re celebrating Summer Rain all week

“Happy 7th birthday my sweet, thoughtful, funny, creative, soulful, vibrant spirit…time moves too fast but every year I’m so in awe of the beautiful human you are and continue to grow to be!

“You are so loved by all around you and inspire us to see the world brighter because of you and the special energy you radiate! Mommy loves you so much!”

The Grammy winner, who shares Summer with her partner Matthew Rutler, is also mom to 13-year-old son Max, who she had with ex Jordan Bratman.

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Christina shares Summer Rain with partner Matthew RutlerCredit: Getty
Christina lost a whopping 50 pounds in 2013, after a considerable weight gain due to her pregnancy and other factors.

Since then, the star has been able to maintain her fit figure with a specific diet and exercise regimen.

In April, the triple threat opened up about her body “insecurities” as she revealed the concerns that plagued her during her 20’s.

Christina graced the cover of Health Magazine for their beauty issue and discussed the pressures surrounding her appearance in the ’90s.

The little girl was praised for her ‘lioness energy’Credit: Christina Aguilera/Instagram
The mother of two confessed that she has a “hard time” looking at photos of herself from that time, as she suffered from negative body image issues.

She told the publication: “I think we all have our good days and our bad days in how we feel about ourselves. Entering this business, I hated being super skinny.

“Once I turned 21, I started filling out a little bit, and I was loving my new curves. I appreciated having a booty,” she admitted, recalling her 2002 album Stripped.

“I have a hard time looking at the early pictures of myself because I remember feeling so insecure.

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The Genie in a Bottle singer also has son Max with ex Jordan BratmanCredit: Instagram
“I would never want to relive my 20s — you’re so in your own head and finding your confidence.”

Christina has since learned to love her body and embrace her curves, especially after becoming a mom to Max, 13, and Summer, seven.

She explained: “As you age, you stop comparing yourself to other people and start appreciating your own body and owning it.

“With age, you figure out that life is too short to waste time thinking about what other people think about you.

“I’ve realized I am making memories for myself and that I shouldn’t worry about what other people think.”

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Christina dropped 50lbs before lockdownCredit: Getty