The heat is on as "Pinoy Big Brother: Celebrity Collab Edition" heads to the Big Night.

With the Big Four finalized on Saturday's episode, the show brought back a game-changing voting mechanic: the power for viewers to unlivote to evict their duo of choice.

Voting — both to save and evict — will happen through the Maya app.

The Big Four duos are: Charlie Fleming and Esnyr (CharEs), Ralph De Leon and Will Ashley (RaWi), AZ Martinez and River Joseph (AzVer), and Brent Manalo and Mika Salamanca (BreKa).

Dustin Yu and Bianca De Vera were the latest housemates to get evicted from Bahay Ni Kuya.

The much anticipated Big Night is happening on July 5.

"Pinoy Big Brother: Celebrity Collab Edition" airs new episodes on GMA Network Mondays to Saturdays at 9:35 p.m.