Odyssey effect: stars sell Greece to a new wave of US tourists

Athens (AFP) - The idyllic beaches of the Greek islands have long been a draw for European holidaymakers, but now a new wave of US tourists is waking up to their charms, driven by stars like Madonna, Katy Perry and Justin Bieber. Madonna celebrated her 68th birthday on Corfu, sharing a whirl of parties and boat trips against the backdrop of the island's landscape with her 20 million Instagram…