Do you belive in UFO'S?

Yes i am one of those ppl who beleive in ufo's. but befor u bash meh understand.. That they are many sitings that cant be explained.. Like the arizona lights or that.. Crash .. buh anyway the universe if vast nd there more then a billion galaxy's. Probly more.. Nd there more then 20 billlion stars in those galaxys.. nd more then 100 billion planets.. In them so i belive they are? Wat do u think?