For better or worse, Christina Aguilera had one of the most talked-about bodies of 2011.

"I've been through my highs, I've been through my lows; I've been through the gamut of all things in this business. Being too thin. Being bigger. I've been criticized for being on both sides of the scale," the Grammy winner tells the February issue of Marie Claire. "It's noise I block out automatically. I love my body. My boyfriend loves my body. My son is healthy and happy, so that's all that matters to me."

Still, the 31-year-old singer -- who's been dating production assistant Matt Rutler for more than a year -- admits there are "certain physical features that I favor over others."

"When I worked on Burlesque, I lost so much weight that I was too skinny. I don't weigh myself -- it's all about how I feel in my clothes. What looks good on one person might not look good on another body type," the Voice mentor tells Marie Claire.

"I happen to be very confident in my own skin. It takes time to get to that place, but it's all about embracing yourself and your body."