Legendary Aerosmith frontman Steven Tyler got engaged over the holidays, according to several reports, to his longtime girlfriend Erin Brady.  Brady has been seen this week wearing a rather large diamond on her finger, sparking the rumors, though neither Brady or Tyler have confirmed the news.  Tyler's longtime jeweler Loree Rodkin confirmed the engagement, however, adding that the ring featured a 5 carat diamond.  Tyler popped the question, Rodkin noted, while the couple were vacationing in Hawaii.  It will be Tyler's third marriage.