“Oh where oh where has Russell Simmons’ girlfriend’s little dog gone, oh where oh where can she be?” Well, that’s exactly what Hana Nitsche has been asking everyone. Her pet Chihuahua named Ivy went missing Tuesday near Doheny Drive in West Hollywoodo, and the German model has been “freaking out” and “desperate” ever since. She’s offering a whooping $5,000 as a reward for whoever finds her precious little puppy. She was even on Twitter sending out depressing and almost pathetic messages saying, “My heart is in so much pain!! I’m really freaking out!! I’m really getting desperate.” Check out the flier she posted up all around the neighborhood in the gallery.