Re: Most frequently (and infrequently) asked Interview Questions!
That’s quite common. It can become a problem if senior management is a part of the meeting.
If one is invited in a meeting then one must have something unique which other participants don’t have. The expertise, the knowledge about a particular area. So one way of overcoming the fear is to convince yourself that I am the best and everyone else in the room is ignorant. That thought will boost the confidence. 
Secondly, one should gather the thoughts first before starting talk. An idea when delivered eloquently has more effect on the audience.