Former Nickelodeon star Jennette McCurdy is opening up about the moment she “broke.”

In her new book, “I’m Glad My Mom Died,” she detailed a moment on the set of “Sam & Cat” when her co-star Ariana Grande said something that “undid her.”

In an excerpt obtained by The New York Times, McCurdy writes, “What finally undid me was when Ariana came whistle-toning in with excitement.”

“She had spent the previous evening playing charades at Tom Hanks’s house.”

McCurdy has been vocal about her dismay for her time at Nickelodeon and the shows she was involved in.

The actress also alleges she was not allowed to pursue outside work opportunities, while Grande was allowed to do so.

When “Sam & Cat” was canceled in 2014, McCurdy claims she was given $300k in hush money to not publicly speak about her experience.

She says she rejected the offer, which is apparent given she’s openly expressed her ill feelings.

McCurdy has publicly crapped on her time on “iCarly” and “Sam & Cat.”