Jennivev "Nene" Santillan Tamayo (born September 27, 1981) is a Filipina reality television personality known for winning the first season of Pinoy Big Brother.
Nene is also known as Nenegizer (alluding to Energizer batteries) because of her strong and long-lasting stamina; this was given during the dance marathon challenge of the housemates.
On December 10, 2005, Tamayo, with the most number of text votes, won the show, after spending 111 days inside the Big Brother house.
Tamayo is currently a member of ABS CBN's circle of homegrown talents named Star Magic.
She also appears as a regular in UNTV 37's morning program Pilipinas, Gising Ka Na Ba?