Comedian Nick Cannon says he won't apologize for his performance during a New Jersey Catholic university's homecoming weekend.

Georgian Court University President Joseph Marbach says Cannon disregarded the terms of his contract and "crossed the line" with offensive words that do not represent the school's core values.

Cannon responded on Twitter, "I ain’t apologizing for [expletive]…I'm sorry your university doesn't believe in freedom of speech!!!"

The tweet was posted along with a photo of an email Marbach sent students expressing his disappointment with Cannon.

Marbach said that the comedian was asked "to avoid vulgarity and explicit sexual content" because Saturday's show was expected to draw older alumni.

Marbach said that a post-event review will be conducted to avoid a similar situation in the future.

But some university students posted on social media that they thought that the show was a success.