
She finds this rewarding, as sometimes it ends in her foing out with you.
When you have a bit of time, act as if you are going out, pick up keys lead etc, and if she goes OTT, say shysh, and go sit down again. Every time she gets silly, stop what you are doing as in getting ready and sit down ignoring her.
Another tack to take when you are actually taking her out is to ask her to shush, and behave, hold her in position if needed. If she barks turn your back on her until she stops jumping and barking at you. turn back towards her, and tell her to sit stand or whatever. Then put the lead on, if she starts going mad again, take lead off and sit down.
What you are trying to show her that when she goes nuts she doesn't get what she wants, and in fact it is counterproductive, as she doesn't get the atention/treat she is expecting.