MANILA, Philippines - After the success of “Pinoy Big Brother (PBB): Teen Clash of 2010,” Big Brother is back on television.

This time though, Kuya serves as a guest judge of ABS-CBN hit talent show "Showtime" alongside Jhong Hilario, Giselle Sanchez, Nikki Gil and PBB teenternational housemate Ryan Bang.

To remain enigmatic, a logo of PBB has been placed in his seat. Acceding to the request of the studio audience on Monday, he sang “Fly Me to the Moon” and Justin Bieber's "Baby."

He will stay as a guest judge until he is voted off by the viewers. If Kuya gets more than 25% of the total votes, he will be evicted from the show.

“Showtime” is now being aired from 11:45 a.m. to 1:30 p.m. from its previous timeslot of 10:30 a.m. to 12:15 p.m. It will be followed by “Pilipinas, Win na Win” at 1:30 p.m.