X Factor 2011: Tulisa Contostavlos" sheer dress leaves little to the imagination

Tulisa hits a bum note as her sheer dress leaves little to the imagination on X Factor

Glam: Tulisa Contostavlos looked chic in a fitted black and gold dress at the X Factor results show last night

Glam: Tulisa Contostavlos looked chic in a fitted black and gold dress at the X Factor results show last night

Oops: The 23-year-old

Oops: The 23-year-old”s sheer dress ended up exposing her bottom as she celebrated with Little Mix

Peachy: The N-Dubz star didn

Peachy: The N-Dubz star didn”t realise her dress would appear transparent under the studio lights

Celebrate: Tulisa couldn

Celebrate: Tulisa couldn”t hide her joy as her girl group got through

Tension: Tulisa and Little Mix (L-R) Leigh-Anne Pinnock, Jade Thirlwall, Perrie Edwards and Jesy Nelson wait to hear their fate

Tension: Tulisa and Little Mix (L-R) Leigh-Anne Pinnock, Jade Thirlwall, Perrie Edwards and Jesy Nelson wait to hear their fate