Explain simply why 2011 is the correct answer to: Passage: Known as the "Comeback Kid", Lily auditioned for The X Factor in Liverpool in front of judges Louis Walsh, Gary Barlow, Tulisa, and Kelly Rowland in 2011. She sang Erma Franklin's "Piece of My Heart" and won praise from all four judges. Gary Barlow said "... oh my goodness, 16 years old that was incredible. That absolutely lifted the top of this arena, well done. Amazing vocals. Amelia I am blown away ..."

Question: Based on this passage, where did amelia lily come on the x factor?. Explanation:
The relevant information is: Known as the "Comeback Kid", Lily auditioned for The X Factor in Liverpool in front of judges Louis Walsh, Gary Barlow, Tulisa, and Kelly Rowland in 2011.