Usher turned up the heat with his labelmate Jordin Sparks during his “OMG Tour” stop at the Jobing.com Arena in her homestate of Arizona on Friday (Nov. 19). The R&B heartthrob, dripping in sweat, seduced the 20-year-old “American Idol” champ with “Trading Places,” while the seemingly uncomfortable songstress reclined on a chaise lounge. Watch Ursh give Jordin a truly OMG moment.