PUZZLE 162 Party People

Thirty people attended a party, and the following comments were made:
Man A: 'A famous singer was there.
But she's not a company employee.'
Woman B: 'I went to the party, but I'm not a company employee.'
Woman C: 'The boss's mother was at the party.'
What is the maximum number of company employees that could have been at the party?

Hint 1

Look closely at who was there and narrow down which people were not employees.

Hint 2

The people appearing in the question are person A, person B, person C, the famous singer and the boss's mother.
All of them were at the party.

Hint 3

You need to figure out the maximum number of company employees, which means you need to reduce the number of party guests who are not company employees as much as possible.
Can any of the people mentioned in the question double up to fulfil more than one role?

Super Hint

Woman B, the famous singer and the boss's mother...
If these three people are in fact one person, then only one guest would not be a company employee.

Answer for 'Party People'

The answer is '29'.