AOL Music sent a tweet about Alex being back in rehab. The link to their site: AOL Music: Backstreet Boys' A.J. McLean Enters Rehab

They say their source is TMZ: A.J. McLean in Rehab

I sure do hope he can battle this old demon from the past for once and for all. Getting off the alcohol is one thing, staying off the alcohol is another. Let's wish him all the best with this.

"Early birds get all the worms, but night owls get the tequila"