"A life of happiness." That's what Miley Cyrus, 19, expects now that she's engaged to Liam Hemsworth, 22, one of the youngsters who kills for food 'n' fun on Hunger Games."I'm so happy to be engaged and look forward to a life of happiness with Liam," Miley told People. (Do the kids in Hunger Games look forward to a happy life? We think not.) Before she met Liam, says Miley, she had no concept of happiness: "I was pretty much like, ‘I'm going to die alone?'?" Liam even gave her a special rock, a "3.5-carat cushion-cut diamond ring, handcrafted in 18-karat gold with intricately carved diamond floral motifs in an art nouveau pattern," says the mag. "And the center stone ...