Hayden & Bar -- Newly Single, Still Unattainable

5/12/2011 5:00 PM PDTby TMZ Staff Sad -- yet amazing -- news ... Hayden Panettiere and Bar Refaeli are SINGLE! Now men everywhere can go back to pretending they've got a shot. Aaah, the sweet, sweet power of denial.Check out TMZ on TV -- click here to see your local listings!