Christina Aguilera Looks Skinnier on Tonight Show

Christina Aguilera looked skinnier as she appeared on the Tonight Show, Us Weekly reported.

Apparently, she's not yet done with her body makeover. She showed a more toned body in the past few months. She appeared a lot sexier during a Wednesday, Sept. 18 appearance on The Tonight Show with Jay Leno. She talked about her return to the The Voice for its fifth season. The 32-year-old singer wore a short, low-cut black dress that showed her curves and her toned legs.

Aguilera told Jay Leno that going back to The Voice is like going back to school. "The boys are fun!" she gushed about her co-judges Blake Shelton, Adam Levine and Cee Lo. "There's something about the four of us getting together. We can't be serious for more than 30 seconds. The guys make me laugh!"

She showed off her toned body in a revealing Maxim spread recently. Aguilera said that she doesn't focus on being sexy.

"I'm such a down-to-earth girl, I'm comfortable in just a jersey and boy's underwear," Aguilera told Maxim. "Trying too hard to be sexy is the worst thing you can do. Sexiness should be effortless."

Sources told Us Weekly that Aguilera has been working with fitness pro Tee Sorge and is also doing yoga.

"It's more of a mind-body thing for her," a source revealed. "She believes in exercise that she enjoys, doing strength work as opposed to intense cardio."