She captures the hope, joy, suspense, mystique, yearning, longing and passion of the diverse song selection with an honesty and truth without any need to overact.
If you attempt to create excessive range of motion through the low back, then you are going to overact your low back muscles, a prerequisite for low back pain!
The father of a young boy who appears to have been accidently pepper sprayed by police over the weekend says he has nothing against police, but believes they did overact.
To overact means changing/enlarging diction, dialogue delivery, expression and gesture to a degree when it becomes visible and communicates (with the audience).