Blackbear, one of the music industries’ breakthrough singer/songwriters, (formerly known as underground Indie/Acoustic artist, Mat Musto), releases Sex The Mixtape, today. Two songs feature Mike Posner, “What It Is” and “Anyone But Me.” Listen to both songs below! I love Mat “Blackbear” Musto! His music sounds amazing! I especially love the song “Cars, Clothes, Calories”…