Not even the mighty Nikki Sixx could emerge from this summer's Glam-A-Geddon Tour unscathed -- but after undergoing knee surgery on Wednesday (Oct. 19), Motley Crue's longtime bassist is on the mend and ready to rock.

Sixx, who injured himself while the Crue was on tour with Poison and the New York Dolls, took to Twitter to tell fans, "Surgery was a breeze. Now I’m under doctor care. Man, I am so gonna milk this situation in my favor."

Now, the "doctor" Sixx was referring to isn't a licensed physician -- she's his girlfriend, model Courtney Bingham. She may not be able to prescribe painkillers, but we doubt he's complaining about her bedside manner.

She knows how to keep Sixx in line, too -- the next day, he tweeted that "Today is a good day to ditch the crutches and break out one of my sick canes I collect," only to be caught and whipped back into shape by Bingham: "Already got in trouble with Courtney for not resting. Good thing she’s asleep right now, I can catch up on my jumping jacks."

Here's hoping Sixx mends quickly -- Motley Crue is scheduled to head back on the road in December for a package tour with Def Leppard and Steel Panther.