Megan Miller of American Idol is back!

The "American Idol" contestant who was seriously injured in an accident 3 DAYS before her audition is finally back on her feet ... and off the crutches ... after undergoing 3 OPERATIONS to fix her busted leg ... 

Megan Miller aka Miss Baton Rouge, scored a golden ticket to Hollywood ... after blowing off a doctor-recommended surgery to treat an infection.

Miller went straight to the surgeon after her audition ... and had to spend a week in the hospital to recover. 

Now, Miller says her leg's all healed up ... and she's focusing all of her attention on prepping for Hollywood week.