I did this a few years ago. While going though my documents I found it and though I would post it just for the hell of it.
Livin' la Vida loca
By Ricky Martin
Performed Merlin and the knights
Set in S4
Arthur was in a bad mood. "I can desired Morgana right now" he turn to Merlin and the knights "Have you got any ideas?"
Gwaine step forward "Yes we do... ready guys... one...two...one an one two three...
"She's into Superstitions black cats and voodoo dolls" sang Merlin. Arthur raised his eye blows
"I feel premonition that girl goanna make me fall" sang Elyan jumping in fort of Merlin Gwaine push them out of the way
"She's into new sensations new kicks in the candle light" Gwaine did a side kick thata almost of Arthur "Okay you made your point" said Arthur but no one heard him
"She got a new addiction for everyday and night" Sang Leon Gwaine got in fort of Leon and sang with Percival
"She'll make you take your clothes off and go dancing in the rain" "That was my solo Gwaine" said Percival
"She'll make you live her crazy life but she take away your pain" Sang Merlin
Then all the knights sang at the same time "Like a bullet in your brain. Come on" "You can stop now" said Arthur Gwaine grinned "No way queen this is the best part."
Merlin and all the knights sang this "Upside inside out she's livin la vida loca. She'll push and pull you down livin la vida laca"
"Her lips are devil red and her skin's the colour mocha" sang Perivale
"She will wear you out livin la vida laca" sang Elyan
"Livin la vida laca, come on" sang Leon "She's livin la vida loca" "Can't you lot stop?" asked Arthur
"Woke up in New York city in funky cheap hotel" Sang Merlin. Arthur rolled his eyes "They no plece called New York"
"She took my heart and she took my money" sang Gwaine putting an arm around Merlin "She must've slipped me a sleeping pill"
"She never drinks water and make you order French Champagne" sang Leon
"Once you got a taste of her you'll never be the same" sang Perivale while Merlin put his hand over Gwaine month
"Yeah she'll make you go insane" Sang Elyan. Gwen come in and walks to Arthur "What's going on?" she asked. "They are singing about Morgana" said Arthur. "Don't ask"
Once again Merlin and the knight sang together again "Upside inside out she's livin la vida loca. She'll push and pull you down livin la vida laca"
"Her lips are devil red and her skin's the colour mocha" sang Perivale once again
"She will wear you out livin la vida laca" sang Elyan he got hold of Gwen and stated to dance
"Livin la vida laca, come on" sang Leon "She's livin la vida loca"
"She'll make you take your clothes off and go dancing in the rain" sang Gwaine
"She'll make you live her crazy life but she take away your pain" Sang Merlin
The Knights all stood in a line with there arm arouned each other should Gwen stood next to Arthur once Elyan let go of her "like a bullet to your brain come on"
Merlin joined the knights in thw line "Upside inside out she's livin la vida loca. She'll push and pull you down livin la vida laca"
"Her lips are devil red and her skin's the colour mocha" sang Perivale
"She will wear you out livin la vida laca" sang Elyan
"Livin la vida laca, come on" sang Leon "She's livin la vida loca
They all stop singing "So what do you think?" asked Merlin
"I think it's quite chaty" said Gwen
Arthur was looking at the knights "God known who Camelot is still standing with you lot preenting it... do you all fancy my sister?"
Gwaine place a hand on Arthur should "Arthur mate... we know your sister evil and everything but she hot"