What goes around doesn’t always come back around. Justin Timberlake seemingly took a shot at his ex-girlfriend Britney Spears during his “One Night Only” birthday concert at Irving Plaza in New York City on Wednesday. “I’d like to take this opportunity to apologize to absolutely f–king nobody,” the *NSYNC alum told the audience before singing his 2002 hit “Cry Me a River,” which was inspired by the pop star cheating on him during their relationship.