How to create powerful burps?

OMG I am a girl and it sounds groos but i love when people are awed by my burps I am like ya I am a girl here me roar! ") LOL but what I do is swallow a gasp of air (man made burp) but dont let it come out swallow it then drink ALOT of soda and jump around alot shake it up! It will come within 2 min> ")