Rap super-veteran Nas has a history of working with "of the moment" R&B singers. If this strikes you as news, see 2000's "You Owe Me" with Ginuwine or 2009's "Make the World Go Round" with Chris Brown. But he might just have his best collab yet with the Swizz Beatz-produced "Summer On Smash," featuring Miguel. The song tested especially well at last night's Detroit installment of vitaminwater uncapped, where Nas brought out the young heartbreaker as a special surprise guest. Watch the two treat the crowd to a one of a kind uncapped live performance above. For live clips and performances from other uncapped shows, visit the vitaminwater YouTube channel.