There's A Rainbow 'Round My Shoulder

'You might say I'm sitting on top of the world with a rainbow round my shoulder.'

'A most satisfactory state of affairs, sir.'

Much Obliged, Jeeves. Chapter 1

Sitting now on top of the world with rainbow round his shoulder, he proposed to get a bit of his own back by taunting her after the manner of the villain in a novel of suspense who has got the hero in his power.

Pearls, Girls and Monty Bodkin. Chapter 10.II

He would have welcomed him with more pleasure if there had been in his demeanour a decent melancholy, for in his current mood the last thing he wanted to see about him was smiling faces, and a single glance told him that here was somebody who was sitting on a pink cloud with a rainbow round his shoulder.

Bachelor Anonymous. Chapter 11