This Week on Instagram…Alyssa Miller and Erin Heather take a top model selfie. Anja Rubik gives a wink. Petra Nemcova works out with a smile. Izabel Goulart says aloha to Hawaii. Alessandra Ambrosio channels the 1920s. Gigi Hadid shows her Calvins. Rosie Huntington-Whiteley has her wakeup call, and much more! Take a look at the most popular models on Instagram, and make sure to follow FGR.