Trace Adkins left a Florida rehab center briefly this past weekend -- to buy a guitar.

Writing songs is part of his therapy as he tries once again to kick addiction, so he was allowed to leave to buy a guitar in Lake Worth, Florida -- under the watchful eye of a rehab employee, of course. Trace picked up a used Martin guitar for $1100. As we've reported, Trace left a cruise ship and headed straight to rehab after an altercation with an impersonator. Before the incident, he'd been sober for 12 years.