AceShowbiz -

Demi Lovato is not happy after learning of unflattering opinion about Wilmer Valderrama. The "Neon Lights" singer took to Twitter on Thursday, April 10 to slam The Daily Beast for writing that the actor was "culturally irrelevant." Lovato said in an angry-sounding post, "Such a classy 'news site' you are. Writing horrible things about people you know NOTHING about. Get a LIFE you ignorant f**ks."

An article posted on the site previously mentioned that the actor was "so culturally irrelevant he relies on the commodification of his young girlfriend's body in order to re-enter the current celebrity conversation," referring to alleged naked photos of Lovato which hit the internet last week. The site went on listing what Valderrama had said about his ex-girlfriends.

Photos of a naked woman who looks similar to Lovato recently emerged. Some photos give a closer look to the woman kissing a man who resembles Valderrama. They can also be seen cuddling in bed in another snap.

A few hours after writing the angry Twitter post, Lovato happily shared a photo of her new hair color. The singer, who previously sported bright-colored hair such as blue and pink, now is a brunette. Sporting bright red lipstick, Lovato gave a thumb up as she posed for the camera. "Gonna give my hair a breeaaakkk, give my hair a break, gonna give my hair a break, my hair a break... Oh yeah, yeah," she wrote.

Gonna give my hair a breeaaakkk, give my hair a break, gonna give my hair a break, my hair a break... Oh yeah, yeah.. pic.twitter.com/4nq0Rwq2Yz

— Demi Lovato (@ddlovato) April 10, 2014