She may have helped heat up "American Idol," but Jennifer Lopez's career is about to get a little colder. The singer/actress/entrepreneur has just signed on for a role in "Ice Age 4: Continental Drift." According to the Hollywood Reporter, Lopez will play Shira, a sabre-toothed tiger who melts the heart of fellow sabre-tooth Diego (Dennis … Continue reading Jennifer Lopez, Jeremy Renner join 'Ice Age 4'