Ready for some 'Trumpets'? Jason Derulo is ready to 'Talk Dirty' at #CapitalSTB This image appears in the gallery:WOAH! See The HUGE Names Confirmed For Capital's Summertime Ball 2015 With Vodafone 8. Ready for some 'Trumpets'? Jason Derulo is ready to 'Talk Dirty' at #CapitalSTB 21 images See the full gallery: WOAH! See The HUGE Names Confirmed For Capital's Summertime Ball 2015 With Vodafone