Jason Derulo opts for a smart black cap for Capital's Jingle Bell Ball. This image appears in the gallery:Jingle Bell Ball 2013 Red Carpet: The Stars Arrive For The UK's Biggest Christmas Party! 32. Jason Derulo opts for a smart black cap for Capital's Jingle Bell Ball. 33 images See the full gallery: Jingle Bell Ball 2013 Red Carpet: The Stars Arrive For The UK's Biggest Christmas Party!