Both Ne-Yo and Pitbull looked seriously cool, don't you think? This image appears in the gallery:One Direction, Ariana, Avicii & More! The MUST-SEE Pictures From Capital's Summertime Ball 2015 79. Both Ne-Yo and Pitbull looked seriously cool, don't you think? Picture: Danny North 171 images See the full gallery: One Direction, Ariana, Avicii & More! The MUST-SEE Pictures From Capital's Summertime Ball 2015