Christina Aguilera's Body Evolution

Christina Aguilera at the 2002 MTV Video Music Awards, performing at the 2011 American Music Awards, and on The Tonight Show in 2012. Credit:; FilmMagic; Getty

Weigh to go, Christina Aguilera!

The five-time Grammy Award winner and Voice mentor has been scrutinized for her fluctuating figure in recent years, but the 31-year-old is happy with her body at any size.

"I've been on all spectrums," Aguilera said at a TCA press conference in January. "You can never be too perfect, too thin, too curvy, too voluptuous. . . I've been on all sides of the spectrum."

She added: "As long as I'm happy in my own skin, that's all I need. I'm happy with where I'm at. I have a boyfriend who loves my body. I love my body. My son is healthy and happy. That's all that matters."

Speaking to Marie Claire in February, Aguilera said she no longer feels pressure to look a certain way. "I happen to be very confident in my own skin," she explained. "It takes time to get to that place, but it's all about embracing yourself and your body."

To see how Aguilera's body has changed over the years, check out the gallery now!