So this is the first one its called SHERLOCK and its to the song So what by the band three days grace. It is the Fandom singing if you don't know the song  the video below or above i really have no idea how this works is the original by three days grace.

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Careful we're crazier than James,

Careful we're sicker than Charles,

Back off we're completely insane,

Or better yet come and stay awhile.

Season one that's

Study in Pink

And the Blind Banker

And the Great Game,

Season two is

Scandal in Belgravia

Hound of Baskerville

And Reichenbach Fall,

We can say whatever we like and hell is it fun,

To always be right!

Careful we're crazier than James,

Careful we're sicker than Charles,

Back off we're completely insane,

Or better yet come and stay awhile,

SHERLOCK!

SHERLOCK!

Season three brings

The Empty Hearse

Sign of Three

And his Last Vow,

Season four

That's not really out yet

But we do have a special

The Abominable Bride,

We can say whatever we like and hell is it fun, 

To always be right!

Careful we're crazier than James,

Careful we're sicker than Charles,

Back off we're completely insane,

Or better yet come and stay awhile,

SHERLOCK!

SHERLOCK!

Season one:

We're hooked forever!

Season two:

we're broken!

Season three:

This can only get better!

Season four:

We're waiting,

Still waiting,

Still waiting!

Careful we're crazier than James,

Careful we're sicker than Charles,

Back off we're completely insane,

Or better yet come and stay awhile,

SHERLOCK!

SHERLOCK!