"Harry! Shut up!" Ron hissed at his best friend halfway through Potions class one day.

Harry stopped humming for a moment to look at the redhead beside him with genuine confusion. "What for?"

"Because you're going to get us in trouble!" Ron snapped.

The Boy-Who-Lived had been humming the same Muggle tune all week, and Ron was developing a twitch because of it. Although not very Muggle-literate, Ron had heard the song a million times before. He scoffed. Who the hell hadn't? But the only problem with Harry humming – or singing, as he sometimes did – was that sometimes he couldn't quite hit the right note. He then spent hours trying to hit it, which usually resulted in headaches for the other boys who shared a dorm with him.

Today was no different… Except that Harry had obviously lost his mind… or turned suicidal.

The Boy-Who-Lived-To-Turn-Suicidal-And-Sing-In-Snape's-Potions-Class gave an indignant huff and turned back to his simmering cauldron.

Ron also turned his concentration to the potion at hand, and, after a few minutes silence, Harry decided to give his best friend a tentative push towards insanity.

He started humming again, low and quiet.

Ron frowned and glared at the bespectacled boy out of the corner of his eye.

Harry smiled and hummed a little louder.

Ron finally turned to glare at him properly and discreetly kicked him under the table as Snape walked past them, eying the pair and their cauldrons suspiciously.

Harry simply grinned and turned away again.

Ron scowled and stirred his cauldron.

"Sugar – doodoodoo – doo – doodoo – Awwwwww, honey, honey -" Harry started singing out of the corner of his mouth.

Ron gave him a mortified look and poked him hard in the ribs.

Harry hiccoughed and started sniggering.

Ron hit him on the head with his ladle. "Shut up!" he hissed through gritted teeth, his eyes darting up to look at Snape, who was glaring at them over another students shoulder.

"Is there something wrong, Mr Weasley, Mr Potter?" their professor asked coldly.

"Uh… N-no professor," Ron said quickly, his tongue stumbling over the words.

Harry snorted beside him but quickly covered it with a cough when Snape rounded his sharp glare on him.

"Ten points from Gryffindor," he snarled, "Each," and went back to looking over another student's potion.

Malfoy smirked at him from the other side of the room, Pansy sneered, Hermione tsk-ed at them from beside Neville and everyone else looked at them like they had gone insane.

And Ron was very near it too.

A few more tense second passed in silence before "Sugar – doodoodoo- doo – doodoo -"

"Harry, no! Please! I beg you!" Ron whispered urgently.

Harry grinned and sang a little louder "- Awwwwwww, honey, honey -"

"Harry!" Ron groaned and covered his ears, as did the other boys who had to listen to the song every morning.

" – You are my CANDEH GIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIRL! -"

Everyone jumped as The Boy-Who-Lived-Only-To-Be-Murdered-By-Snape-Because-He-Sang-In-Class-Off-Key-And-Out-Of-Tune-Very-Loud started wailing and his fellow Gryffindors gave a collective groan as his shrill shriek penetrated the sanctuary of their hands.

Harry screwed his eyes shut as he finally finished the song "- AND YOU GOT ME WANTING YOOOOOOOOOOOOOOOOOOOOOOOOOOOOOU!" He pointed in a random direction at a random person. He grinned dumbly and opened his eyes, arm still extended and finger still pointing……………………………. At Snape. "Eep." His grin dropped away fairly fast. As did his arm.

The Potions professor was livid. You could tell, from the way his fists were clenched at his side, shaking visibly, to the way his eyes were closed tightly, glare still predominant on his features. After a few shocked seconds Snape managed a few words through very tightly clenched teeth, "Detention," he said barely above a whisper, his eyes still pressed tightly together, "And five hundred points from Gryffindor."

"Eep."