You're my strongest weakness
In withdrawals, I need it
You're my secret fix
You're my secret fix
Need you more than breathing
I was broke, you healed me
Ain't no drug like this
No, no drug like this

Don't you think it's time we cross that lover's line?
Baby, say you'll be mine

If you're up for it, I'm all yours now
If you're up for it, I'm down
If you're up for it, I'm all yours now (all yours, I'm all yours)
If you're up for it, I'm down (I'm down) for you

(Are you up for it?)
The only one I want is you
(Are you up for it?)
The only one I want is you
(Are you up for it?)
The only one I want is you
(Are you up for it?)
I said the only one I want is you

Every time I see ya, instant amnesia
Can't remember life before you (no)
Or anyone before you (hey)
My midnight daydreams ain't PG-13
'Cause I got my hands on you
I want my hands on you

Don't you think it's time we cross that lover's line?
Baby, say you'll be mine

If you're up for it, I'm all yours now
If you're up for it, I'm down (I'm down, I'm down)
If you're up for it, I'm all yours now (I'm all yours, I'm all yours)
If you're up for it, I'm down (I'm down) for you

(Are you up for it?)
The only one I want is you
(Are you up for it?)
The only one I want is you
(Are you up for it?)
The only one I want is you, whoa
(Are you up for it?)
The only one I want is you

I wanna be the one you want
I wanna be the one you want (oh yeah, babe)
I wanna be the one you want
I wanna be the one you want (say)
I wanna be the one you want
I wanna be the one you want (woo)
I wanna be the one you want
I wanna be the one you want

If you're up for it, I'm all yours now
If you're up for it, I'm down
If you're up for it, I'm all yours now
If you're up for it, baby, I'm down for you

(Are you up for it?)
The only one I want is you
(Are you up for it?)
The only one I want is you
(Are you up for it?)
The only one I want is you
(Are you up for it?)
The only one I want is you

Copyright: Downtown Music Publishing, Sony/ATV Music Publishing LLC
Writer(s): Andrew Wells, Josh Kear, Meghan Trainor, Tyler Johnson