Limelight.

Lady Gaga replied to a fan on twitter who praised her new hair color.

@SarahMRMonster: “@ladygaga this lime green weave is fabulous… Seriously I’m in love.”

@ladygaga: “@SarahMRMonster color is limelight Uvglo.”

Lady GaGa used this new hair color during her visit to the 'Born Brave Bus' and on her 'Born This Way Ball' concert in Saint Paul, Minnesota, USA yesterday.