R&B singer R. Kelly did not get his bonded revoked for missing a crucial court date in his child pornography case, but a judge gave him a stern warning. Kelly apologized to Cook County Judge Vincent Gaughan, who set a May 9 trial date. He missed his Wednesday court appearance when his tour bus was delayed in Utah because its logbooks didn’t document enough rest time for the driver. Gaughan said that in similar situations in the future, Kelly must fly to make his court dates on time.He also ordered the singer to cancel a Jan. 13 concert to ensure that he makes a Jan. 14 court date. Kelly, 40, has pleaded not guilty to child pornography charges for allegedly videotaping sex acts with a young teenage girl in or before 2000.