By Niamh Spence Singer Britney Spears has let fans into her beauty regime as she revealed she has undergone laser treatment on her face. The Toxic hitmaker recently dyed her hair a lighter blonde shade as she indulges in some ‘self care’ and updated fans on Instagram. The 42-year-old revealed that she’s a fan of all her recent treatments though as the new lighter hair do isn’t to her taste as she revealed she hates her new hair and wants to change it. Sharing a selfie on Instagram, Britney wrote: “I haven’t been really good with my self-care… I haven’t done my nails in two months and I did my …