Usher and Chris Brown had words, and allegedly fists, fly over the weekend. Chris Brown celebrated his birthday in Las Vegas with a skating party. Usher attended and sang “Happy Birthday.” Multiple sources report that things took a turn when Chris tried to flirt with Teyana Taylor. She apparently didn’t want to have anything to do with him. Brown allegedly started yelling her out, which caused Usher to try and calm Breezy down. Chris then started hollering at Usher. Brown and his crew left, and Usher followed them out of the skating rink. A witness said Brown’s crew and Usher disappeared behind some charter buses. Usher reportedly emerged with a bloody nose.Both artists appeared at the Lovers and Friends festival on Saturday, neither looking injured. Time will tell if we hear more about the incident between the entertainers.