Mayor Bill de Blasio refuses to say whether he’s “PREETY HAPPY.”

De Blasio wasn’t amused Monday when asked about the front page of Sunday’s Post, which had “PREETY HAPPY” as the headline next to an image of the mayor drinking champagne in celebration of President Trump’s sudden firing of Manhattan US Attorney Preet Bharara.

Bharara’s office currently is probing de Blasio’s campaign fundraising practices.

“Are you ‘PREETY HAPPY’?” NY1’s Errol Louis asked Hizzoner during their weekly segment.

“I don’t pay attention to the front page of the New York Post as a matter of course and I am just not going to comment,” responded a stone-faced mayor. “There is an ongoing investigation going on.”

The mayor also wouldn’t comment when asked whether his lawyers have told him whether Bharara’s ouster “is good or bad” for him.