Tula Paulinea Contostavlos (born 13 July 1988) is an English singer-songwriter and actress who performs under the name of Tulisa. Her father is Greek; her mother is Irish. She is best known for being a member of the Camden-based hip hop group N-Dubz. She was in the band with her cousin Dappy and their friend Fazer. Contostavlos was a judge on the eighth series of "The X Factor". She mentored the "Groups" category. They included Little Mix, the first group to win the competition.