Greetings, friends! For your enjoyment, we present to you Allison's excellent parody of Taylor Swift's Shake it Off, Gravity Falls style. Allison did the heavy lifting on this piece, though I made some few suggestions. Have fun!
Gravity Falls Shake It Off
 Dipper:
Dipper: 
I stay up too late,
Got Cipher in my brain,
That’s what people say,

I go on too many dates,
But I can’t make them stay,
At least that’s what people say,
That’s what people say.
Dipper:
But we keep cruising,
Can’t stop, won’t stop moving,
It’s like I’ve got this sister by my side,
Saying it’s gonna be all right.

‘Cause Bill Cipher’s gonna play play play play play 
And Gideon’s gonna hate hate hate hate hate
Baby, I’m just gonna shake shake shake shake shake
Shake it off, I shake it off.
The rift is gonna break break break break break
And our Grunkle is a fake fake fake fake fake 
But I’m just gonna shake shake shake shake shake
Shake it off, I shake it off.
 Mabel:
Mabel: 
I’m always kind and sweet,
I do hundreds of good deeds,
And that’s what she don’t see,
That’s what she don’t see.
 Dipper:
Dipper: 
I’m fighting on my own,
Trusting no one as I go,
And that’s what they don’t know,
That’s what they don’t know.
Mabel:
But I keep moving,
Can’t stop won’t stop grooving,
 It’s like I’ve got this brother by my side
It’s like I’ve got this brother by my side 
Saying it’s gonna be all right.
‘Cause Ford is gonna play play play play play
And Blendin’s gonna hate hate hate hate hate
Baby, I’m just gonna shake shake shake shake shake
Shake it off, I shake it off.
Fans’ hearts are gonna break break break break break
 Gotta make my birthday cake cake cake cake cake
Gotta make my birthday cake cake cake cake cake 
But I’m just gonna shake shake shake shake shake
Shake it off, I shake it off.
I, I shake it off, I shake it off
I, I shake it off, I shake it off
I, I shake it off, I shake it off
I, I shake it off, I shake it off
Bridge
 Soos:
Soos: 
Hey hey dudes,
Just think, while you’ve been getting down and out
About the monsters and the dirty dirty secrets of the town,
You could have been getting down,
To this sick beat.
 Dipper:
Dipper: 
Grunkle Ford wants me by his side,
 Mabel’s sad, but I’m just gonna shake it.
Mabel’s sad, but I’m just gonna shake it. 
Bill:
AND THE NIGHTMARES COMING HERE ARE GONNA MAKE IT WEIRD
WON’T YOU COME ON OUT, FALLERS, WE CAN SHAKE, SHAKE, SHAKE.
Dipper:
(Yeah, oh)
 ‘Cause Bill Cipher’s gonna play play play play play
‘Cause Bill Cipher’s gonna play play play play play 
And Gideon’s gonna hate hate hate hate hate
Baby, I’m just gonna shake shake shake shake shake
Shake it off, I shake it off.
 The rift is gonna break break break break break
The rift is gonna break break break break break 
And our Grunkle is a fake fake fake fake fake
But I’m just gonna shake shake shake shake shake
Shake it off, I shake it off.
I, I shake it off, I shake it off
I, I shake it off, I shake it off
 I, I shake it off, I shake it off
I, I shake it off, I shake it off 
I, I shake it off, I shake it off
I shake it off, I shake it off
I, I shake it off, I shake it off
I, I shake it off, I shake it off
I, I shake it off, I shake it off