You might even think you’re the No. 1 fan of American Idol.

Kelly Clarkson is the No. 1 fan of American Idol, and she proved it during her stint as guest judge on the first live show of the singing competition’s farewell season.

Plus, she performed at the end of the show, reminding every one of the season 15 contestants why she won.

Of course, Clarkson has a very good reason to love the show, considering she was crowned its very first winner and became a superstar after trying out for some rinky dink reality show that nobody had ever heard of.

As you could tell when she called back to each singer’s earlier performances, Clarkson has not only been watching Idol, she’s actually been paying attention and listening hard to each of the finalists.

The episode also saw Clarkson look back at some of her most memorable moments from her Idol season, a.k.a. catnip for her fellow Idol superfans.

Then she performed her emotional song “Piece By Piece” and caused the aforementioned sob-fest when everyone became too emotional to handle what was happening, further cementing her position as the best American Idol winner ever.

American Idol airs Thursdays at 8 p.m. on Fox.

Kelly Clarkson