“American Idol” is about to come to a close. The show’s two-part Season 15 finale will air this week. The past 15 seasons of the show were definitely memorable. But of course some moments stood out more than others. Below, we round up 15 Idol moments that fans will never forget.

1. Crazy Moment: Can Paula Abdul see the future?

One of the things that made this reality singing contest work was its panel of judges. But according to Rolling Stone, throughout her nine seasons on American Idol, Abdul just became the “the butt of many jokes.” This moment from Season 7 was particularly memorable. Abdul said contestant Jason Castro’s second song left her “a little empty.” She also claimed she liked his first song better. This would be perfectly fine, except Castro has only sung one song so far.

2. Crazy Moment: Nicki Minaj and Mariah Carey’s feud

Abdul might have had gaffes. But, according to Entertainment Weekly, her exit prompted the “beginning of the end  of the judging powerhouse.” In Season 12, Nicki Minaj and Mariah Carey were tapped to be judges on the show. But they did not get along too well.

3. Craziest Auditions: Bikini Girl

Katrina Darrell auditioned for the show in Season 8 wearing nothing but a bikini. She was cut during Hollywood Week. But she is most remembered by this confrontation with Idol judge Kara DioGuardi.

4. Craziest Auditions: William Hung – “She Bangs.”

5. Craziest Auditions: The Contestant Who Got Simon Cowell Literally Wet

Say what you want about Hung, at least he took rejection well. This dude, on the other hand, did not.

6. Craziest Auditions: General Larry Platt – “Pants on the Ground”

7. Craziest Hair: Sanjaya Malakar’s Crazy Ponyhawk 

8. Shocking Elimination: Chris Daughtry, Season 5

9. Best Guest Performance: Katy Perry

10. Best Guest Performance: Prince

11. Best Guest Performance: Judas Priest

12. Greatest Idol Performances Ever: Carrie Underwood – “Alone”

13. Greatest Idol Performances Ever: David Cook – “Billie Jean”

14. Greatest Idol Performances Ever: Constantine Maroulis – “Bohemian Rhapsody”

15. Greatest Idol Performances Ever: Adam Lambert – “Mad World”