Is Courtney Love's suddenly spindly bod a result of serious self-restraint or surgery? The rehabbed rocker-turned-itty-bitty-string-bikini enthusiast is raging against rumors that she dropped 45 pounds by going under the knife and not, as she claims, through diet and exercise.

"No doctor would do gastric bypass, even if I begged," she insists to Us Weekly. "No lipo, no gastric, no tummy tuck."

Courtney, 42, also rebuffs the nip-tuck talk on her moonwashedrose.com Web site (we took the liberty of fixing the oodles of punctuation and spelling mistakes), and even reveals the mogul who gave her thin-spiration.

"I lost weight the hard way and people can't accept it," she writes. "Whenever anyone who loses weight by determination and grit fast it's suspect. I got my inspiration from Oprah losing so much weight on Slim-Fast. That's how I did it.

Love's bikini bottoms are apparently in a bunch over a recent New York Post item, in which a "friend" alleged, "She's telling people she got the gastric band surgery."

The so-called pal then adds (and we urge you put down any foodstuffs before continuing), "She even said she had to sleep with a towel by her because the surgery makes her [vomit] all the time and is worried she won't be able to make out with anyone because of her breath."

But Love denies being pound foolish, railing on her site, "This is nonsense -- my breath is great and I don't 'vomit into a towel.' It's just cynical crazy bulls**t."

Meanwhile, a source tells Us that Courtney is so serious about her downsizing that "she's getting rid of all her size tens, eights and sixes," with some of her duds set to be auctioned off on eBay and others donated to women in need (geez, haven't these poor souls suffered enough?).

The previously hard-living Love has also gone macrobiotic, reportedly employing the same chef once used by organic-loving pals Madonna and Gwyneth Paltrow.

"She's also quitting cigarettes," a source adds to the mag. "Courtney doesn't want anyone or anything toxic in her life any more."

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