Ariana Grande 'regularly' missed filming 'Sam & Cat,' Jennette McCurdy details in her memoir 'I'm Glad My Mom Died

According to McCurdy, Grande was absent "to go sing at award shows, record new songs, and do press for her upcoming album," while she was left to "angrily hold down the fort

McCurdy, who played Sam Puckett on "iCarly," sympathized with Grande but was still upset because she was not given the same opportunities, according to the star.

At first, Grande’s absences were sporadic but eventually, the actress and singer reportedly missed an entire week on set.

"If I wasn’t such a good sport to begin with, I wouldn’t be in this predicament in the first place. I wouldn’t be on this sh**ty show saying these sh**ty lines on this sh**ty set with this sh**ty hairstyle," she wrote

McCurdy wrote that she was initially approached for her own show on Nickelodeon and resented starring alongside Grande

Ariana is at the stage in her career where she’s popping up on every 30 Under 30 list that exists. And I’m at the stage in my career where my team is excited that I’m the new face of Rebecca Bonbon,