Chris Brown managed to stir up some controversy once again at the 2012 Grammy Awards ... even if all the singer did was show up, perform and win. Some stars, including Miranda Lambert, wondered why the Best R&B Album winner / convicted felon was featured on not one but two performances. On Monday, the country superstar tweeted "Chris Brown twice? I don't get it. He beat on a girl ... Not cool that we act like that didn't happen." "He needs ...