AJ McLean doesn't believe he'd be here today if not for his 8-year-old daughter, Lyric. "She's smart as a tack, but I don't know if she really, really grasps the idea that she saved my life - because she did," the longtime Backstreet Boys member, 47, tells Us Weekly in an exclusive interview promoting his upcoming solo EP, Hi My Name Is Alex. "Four years ago, when I came back from a trip to Miami, [where I was] doing a show, I smelled like a bar. I had done a s*** ton of cocaine. I was off my rocker. And when I got home, she would not come within 2 feet of me. She wouldn't even hug me.