Izzy may have lost fiance, Denny Duquette, during the season finale of Grey’s Anatomy—but you can be assured that actress Katherine Heigl is not spending her time mourning.  People Magazine has exclusively confirmed that Heigl is now engaged to her boyfriend, 25-year-old musician Josh Kelley.  The two met last year when Katherine, 27, appeared in Josh’s music video for “Only You”.  What followed next can be ripped out of a former model-meets-musician playbook.  No date for the nuptials has been announced yet.