Kelly Clarkson's Cameo On The Rookie Had Fans Going Wild

Sometimes, audiences react negatively to celebrity appearances, a prime example being Ed Sheeran's "Game of Thrones" cameo (via People). They feel a famous face detracts from the show's storyline. However, "The Rookie" fans welcomed Kelly Clarkson with open arms and reacted positively to her guest spot.

On Twitter, @MissWinter29 excitedly posted, "Aaaaagghhh! Kelly Clarkson on #TheRookie!" @CauseRSisEpic said, "Kelly Clarkson on The Rookie is one of my fave things to happen on this show!" @moviestan18 referred to the singer as "QUEEN KELLY."

Many enjoyed the fact that it's Melissa O'Neil's character of Lucy who compliments Clarkson. It's a full-circle moment because, in Season 2, Episode 16 ("The Overnight"), Lucy accidentally finds herself auditioning for "American Idol" in front of Katy Perry, Luke Bryan and Lionel Richie. In real life, O'Neil took home the title of "Canadian Idol" in 2005 (via E! News).

It's clear that fans of "The Rookie" enjoyed Clarkson's cameo, but she also received praise from the cast. Eric Winter, who plays Tim Bradford, said, "This is really special for us that Kelly's here, to be able to share this scene with Kelly and show her how fun we can be, it's been a real treat."

Nathan Fillion shared his belief that Clarkson's nerves were for naught: "Well, she said she was super nervous. I don't know that I entirely buy that. I see what she does on a daily basis with her TV show..."

As for Clarkson, despite the stressful experience, it was a once-in-a-lifetime opportunity that she said made her love "The Rookie" and its stars even more.