The feud between Nicki Minaj and her American Idol co-judge Mariah Carey shows no signs of slowing down, Breaking Celebrity News reports.

Minaj, 30, attacked the Always Be My Baby singer on Twitter Thursday morning calling her bitter and insecure with no personality.

The current rumblings between the two was fuelled by a series of heated exchanges on American Idol Wednesday night when Mariah, 43, taunted the Super Bass star for never having a number one single on the Billboard Hot 100 chart.

PHOTO: Nicki Minaj Has Onstage Wardrobe Malfunction

During the show, Nicki fought back Mariah’s jibes by breaking out a cotton swab and telling the diva to clean out her ears.

“Why a woman SO successful at her age, is still so INSECURE, and bitter,” Nicki wrote in a series of messages aimed at Mariah.

Nicki also referenced reports that Jennifer Lopez has been eyed up for a return to the reality TV show to replace Mariah.