Singing in the privacy of your own home, preferably into a hairbrush in front of a mirror is a God-given (if not terribly clichéd) right. It doesn’t matter if you’re the next Su-Bo or a worse chanteuse than Victoria Beckham – nobody cares because they can’t actually hear you. So why on earth, might you ask, did Denise Richards decide to showcase her godawful warbling at a baseball game last week? Who knows. Some things are best left to SingStar, Denise – and not a televised sports event. “I’m not a singer, and then to be in front of all those people is a little terrifying,” said Denise after the ear-splitting showcase. Really? It didn’t show. Er…