Sheeran began recording in 2005, which led to the release of his first EP, The Orange Room EP.

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In the living room there are pale orange leather armchairs mixed with traditional pieces like a dark wooden side table.

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Walls are painted bright colors: orange in the entryway, yellow in the living room and bright green cabinets in the kitchen.

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"All of those are impacting CEOs' levels of confidence to really deal with their businesses on a go-forward basis, " he said in the PwC Lounge, an ultra-chic Davos party room with white sofas and chairs and orange and red flowers.

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From outside, a little of the ugly orange East Berlin street lighting filtered in, and the objects in the room seemed to quiver slightly.

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Another nice touch: Mullen tricked out a conference room in Virgin style, with groovy lamps, red and orange Gerber daisies and bar stools--resembling those in the airline's Upper Class cabin--all around a conference table.

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He generally rises at 10:20 a.m. and tends to fast through the workday, taking his sole meal at dinner, after a half-hour power nap in his office lair, an 8-by-10 room with nothing but a scribble-filled whiteboard, purple couch, two orange earplugs and an inhaler.

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