I want to know the answer to the following question:
When was Shania Twain a guest judge for auditions?
All the background I'm provided with is that "Guest judges were used in the audition rounds for seasons four, six, nine, and fourteen such as Gene Simmons and LL Cool J in season four, Jewel and Olivia Newton-John in season six, Shania Twain in season eight, Neil Patrick Harris, Avril Lavigne and Katy Perry in season nine, and season eight runner-up, Adam Lambert, in season fourteen.". Is that enough to answer the question?
Answer: yes