My house is infested with fleas. Should I let loose some ladybugs?

Hmm, first thing, don't trust the internet all the time. But in this case, maybe. Does your cat still have fleas? If so, get them treated right away. Then, try to find other remedies for what is going on. If not, release the ladybugs if necassary. But check if they won't just eat fleas first. :) Hope I helped!