Christina Aguilera has broken her silence over her much talked about weight loss. Photo: Alberto E. Rodriguez/Getty Images for The Recording Academy. Aguilera previously seen sporting a fuller figure.

Christina Aguilera is kicking off the new year ... but the medication has increasingly been prescribed off label for weight loss, along with several other similar medications.

Captioning a video montage that began with various social media comments people have left on her posts — including speculation about her recent weight ... to the claims, Christina remarked ...