Britney Spears started the week off with a bang at Winston's in L.A. where she had spent the night celebrating the launch of her album Blackout with friends. 

Clutching her mouth, the Toxic singer - who was sporting blemished skin and neglected hair extensions - felt the cold as she left the club and flashed her knickers to the frenzy of photographers who waited outside her car...

Photos Courtesy Of WENN