The next confirmed act for this year's Summertime Ball is 'Wild Ones' rapper Flo Rida! This image appears in the gallery:Summertime Ball 2012 Line-Up In Pictures 9. The next confirmed act for this year's Summertime Ball is 'Wild Ones' rapper Flo Rida! 15 images See the full gallery: Summertime Ball 2012 Line-Up In Pictures