In late May, Aerosmith announced the frontman had voluntarily entered rehab after suffering a relapse following 10 years of sobriety and over the weekend, TMZ reported that the rocker had left the facility. A rep for Aerosmith subsequently confirmed the news to People, and added, “He’s doing extremely well and looking forward to being back on stage.” The musician left his treatment centre last week and stayed for longer than the required 30 days, according to TMZ. The 74-year-old, who has been very open about his struggles with drug and alcohol addiction…