A.J. McLean Enters Rehab

A.J. McLean has entered rehab for the third time.

The 33-year-old Backstreet Boys singer underwent treatment for substance abuse back in 2001 and 2002. TMZ reports that A.J.‘s struggle has been interfering with plans for BSB and New Kids on the Block‘s upcoming tour.

“For personal reasons, I’ve checked myself into a rehab clinic,” A.J. said in a statement (via People). “With 2011 being a busy year for Backstreet, I want to be healthy and perform and sing for people at my very best and happiest. None of this will affect our current tour plans and I look forward to seeing everyone really soon! Thank you for all of your support and respecting my family and friends privacy during this time.”

Best of luck to A.J. as he takes steps toward a healthier lifestyle.