Jennifer Hudson writing memoir about weight loss

(CBS/AP) Jennifer Hudson has dramatically dropped the pounds, and now she's ready to spill her secrets.

The Oscar-winning actress and singer has signed a deal to write a memoir chronicling her weight loss journey.

Pictures: Jennifer Hudson
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Dutton, an imprint of Penguin Group, announced Tuesday that Hudson, a Weight Watchers spokesperson who is now 80 pounds lighter since her "American Idol" days, will offer advice on anyone "coping with weight issues" and will her share personal tips for "losing and maintaining weight loss."

The currently untitled memoir will be released in January.

The 29-year-old Hudson is known for the film "Dreamgirls," for which she won an Oscar for best supporting actress. She also won Grammy award for her eponymous debut album in 2009.

Her latest album, "I Remember Me," came out this year.