Mark Owen's stint in rehab has reportedly halted work on Take That's reunion recordings with former bandmate Robbie Williams.
The 38-year-old British singer checked into a clinic last week (ends14Mar10) following revelations about his affairs and drinking problems.
Owen admitted cheating on his wife before they wed last year (09) and also confessed to nursing a secret alcohol habit, which began in 1996 after the Back For Good hitmakers split.
He's vowed to battle his demons with professional help - but his treatment means studio time with the band and Williams, who quit in 1995, had to be cancelled over the weekend (13-14Mar10), according to Britain's Daily Mirror newspaper.
A source tells the publication, "They were all heading down there, Robbie included, but the plan has been scrapped for now. All they care about is Mark at the moment and it wouldn't feel the same all of them practising for their comeback without him.
"All excitement about the future is very much on hold because Mark’s got to get better first."