Simplify the following text for a Grade 7 native English-speaking person.
Original: According to the Boston Herald , country stars Faith Hill , Shania Twain , and Tim McGraw have all confessed to using Auto-Tune in performance , claiming it is a safety net that guarantees a good performance .
Simplified: The Boston Herald revealed that country music stars Faith Hill and Tim McGraw have both said they are using Auto-Tune in performance . They said it is a safety net that guarantees a good performance .