Stacy Keibler -- Visiting Der Clooney ... in Germany

With breakup rumors continuing to swirl ... ('cause with George Clooney they always are) ... Stacy Keibler landed in Germany today, presumably to spend some quality time with her man.

Sources close to the couple tell TMZ ... the rumors of the couple's demise are way off-base -- in fact, we're told the two still live together and are currently redecorating the kitchen in their home.