Singer Sky Ferreira has axed the remainder of her U.S. tour dates citing a vocal injury, just weeks after her drug arrest. The Everything Is Embarrassing hitmaker has been on the road supporting rockers Vampire Weekend, but she has pulled out of their trek after straining her vocal cords at a show in San Diego, California, on Tuesday (01Oct13). The 21 year old took to her Twitter.com page to share the bad news with fans, writing, "I'm so sorry... I'll basically be a monk by the time this is over." Ferreira will now miss out on shows in Albuquerque, New Mexico; Tulsa, Oklahoma; Nashville, Tennessee; Kansas City, Missouri; and Grand Prairie, Texas. Ferreira is hoping to be back onstage at her debut album release concert in Los Angeles on 27 October (13), while she is also scheduled to headline an Elliott Smith tribute show in New York on 21 October (13). Her cancellations come after she and her DIIV frontman boyfriend Zachary Cole Smith were arrested in New York last month (Sep13), when cops pulled over their vehicle and found the rocker to be in possession of heroin. Ferreira was reportedly arrested for possessing Ecstasy.