For everyone saying that investing her money in the market right now is not smart is wrong. It Is a smart thing to do.
There are a lot of people and firms who are still making a lot of money in this economy, and it is important to note that the ones that got really fucked were the older investors who were about to pull their money out and retire. Since older investors may not have another 10 years to wait for their investments to recover they are left with big losses. But for the younger investors who plan on taking positions for the next few decades, regardless of the economic crisis, their investments in the markets will inevitably grow into a large return in the long run, guaranteed (assuming money was invested with some common sense).
And realistically she will get much less than 100K. The winnings will be taxed, as Internal Revenue Code strictly states that contest winnings are a part of earned income. Depending on how she plans her finances the 100k could be taxed at the highest tax rate of 35%, this would leave her with 65K. Still a very large chunk of money. But you also have to consider that this payment will mostly likely be presented as an annuity payment or a one time payment adjusted for the time value of money. Assuming that she takes a lump sum payment, and with figures based off a 10 year gov bond, she would get something like 69K, less taxes would put her at around 50K. Or she could take something like $8,500 a year for 10 years (not including taxes). The latter annuity would be the smarter choice from a tax prospective because she would be paying less taxes in the long run. But again, this all depends on how her financial adviser plans this all out and depending on what they do she could end up with most of the 100k.
Regardless, the girl that won was a very lucky girl and I hope she invests most of her money and has the foresight and prudence to realize that if she invests her money now she can retire easily when she is 40; which is something that the majority of Americans will not accomplish in their lifetime.