Tulisa's pal to expose her wild sex and drugs past in 'Big Brother' house

London, June12 (ANI): An old pal of Tulisa Contostavlos has revealed that he might expose her darker side, that involves a wild sex and drugs past, in the 'Big Brother' house.

The troubled star's pal, who will be entering the house for the new series this week, got to know the singer and her 'N-Dubz' team mates, Dappy and Fazer, as they all grew up on the streets of north London, the Daily Star reported.

The unknown friend alleges that he is all set to reveal the explosive truth about the star's background and her tearaway years as a young singer.

Tulisa, who was arrested last week on suspicions of her involvement in a drugs deal, has been hiding away from the media glare since then and is probably shocked to the core after the news broke out.

An insider revealed to the publication that the housemate, who is now a professional sportsman, has previously been involved in music production.

The source asserted that the gorgeous star should be very worried because this guy has known her and her band members for years and used to write music with them when they were all in their teens.

The insider added that the he is very well-placed to know a lot about some of the darker side of the singer's character and this could be massive for her.(ANI)