Where would you put your money if you needed it in 5 years?

Title pretty much says it all, but I'll provide a little bit more background:

I'm an aggressive saver in my mid-twenties and am looking for some advice. I want to have about $150k saved in 5 years from now for a wedding & a down payment on a home. I'm able to save a decent lump-sum each month, but am a bit concerned to just throw it in a general stock market ETF. I also don't really want to put it into a CD or a bond ETF since the rates of return are so low. Do I run the risk of putting it in the market since I'm young? Or do I play it conservatively and just put it in a low risk/return security like a CD or bonds? Or is there a better option I'm not considering?

Thank you in advance for your input.