You know someone’s a sex symbol when their fans can’t tolerate them getting married. This was the unfortunate outcome of Usher’s 2007 marriage to Tameka Foster Glover, which caused a slump in his sales until he divorced and put out “Raymond vs. Raymond” this year. Ladies have their single R&B heartthrob back. Oh yes, the ladies showed up at MSG. And everyone enjoyed a renewed sense of sexual vitality in his newer songs like “Little Freak” and “Daddy’s Home.” With Trey Songz.