98 Degrees Stud Topless Chippendales Debut

5/13/2011 5:45 AM PDT

98 Degrees Stud Jeff Timmons -- Shirtless Chippendales Debut

Former 98 Degrees boy-bander Jeff Timmons made his half naked debut at Chippendales in Vegas last night ... but unfortunately for the crowd, the only piece of clothing he removed ... was his shirt.