LIZZO LOSES 50 POUNDS, PACKS ON THE WORRY!

Terrified she'll return to bad old eating habits

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Super-plump Grammy winner Lizzo's been showing off her slimmed-down bod on social media, but sources tattle that she's still struggling to adjust and using all her willpower to keep from piling the pounds back on.

The plus-size 36-year-old warbler — real name Melissa Jefferson — once lugged around over 300 pounds on her 5-foot-10 frame, but recently bragged that she's lost more than 16 percent of her body fat, putting her at under 250.