Please answer me..

Is there such thing as real fast and healthy weightloss?
A friend of mine gave up meats and started eating lots of fruits and veggies and things like beans nuts and seeds. So she's losing a lot of weight I means is been like 2-3 weeks and you can...

really see he looking skinny!
She's not even Working OUT! other than normal everyday walking and stuff.

Please HELP! I want to know if its ok for her to lose this much weight so quickly.

You can safely lose up to 2 pounds per day...if you're seriously obese, and you do TONS of stuff (exercise, and change your diet, etc)...however, if you're only mildly overweight, then you should expect to lose 1-2 pounds per week from a change in diet...more than that, and I think they're probably not eating enough which will cause some serious health issues.

If your friend is really obese then it's good or otherwise it's not since it would be difficult to maintain weight at a certain level rather than losing it so your friend might regret this later.Once he/she sees a change,tell her to either slow it down till she meets her required weight.