[Verse 1]
How did we get here?
You showed up solo, but I know she's at home
And you're acting so sincere, sincere, sincere
I was thinking 'bout leaving
Making up a lie 'bout how to say goodbye
To stop you, boy, from cheating, cheating
Stop you, boy, from cheating (Cheating)

[Pre-Chorus]
Stop pretending she's not sending fears straight to your phone
It's so tempting, no good ending with you and me alone

[Chorus]
Tonight, I'm kissing my ex-best friend's ex-boyfriend, ex-boyfriend
Tonight, you'll both be saying my name like I'm to blame and it's a shame
Ex, ex, oh, I'm not sorry
Her text won't, won't stop me
Tonight, I'm kissing my ex-best friend's ex-boyfriend, ex-boyfriend

[Verse 2]
Wasn't thinking how she'd feel
Should've known she'd be pissed when she heard that we kissed
But you said, "What's the big deal, big deal?"
You know that you're the worst thing I could steal
How'd I do this to my best friend?
'Cause it's not my style to fall for a smile
But we're gonna make a mistake, mistake
Gonna see a heartbreak, heartbreak
[Pre-Chorus]
Stop pretending she's not sending fears straight to your phone
It's so tempting, no good ending with you and me alone

[Chorus]
Tonight, I'm kissing my ex-best friend's ex-boyfriend, ex-boyfriend
Tonight, you'll both be saying my name like I'm to blame and it's a shame
Ex, ex, oh, I'm not sorry
Her text won't, won't stop me
Tonight, I'm kissing my ex-best friend's ex-boyfriend, ex-boyfriend

[Bridge]
Someone's gonna get jealous
Someone's gonna get hurt
Someone's gonna get lucky (Hey)
But it's not gonna be her

[Chorus]
Tonight, I'm kissing my ex-best friend's ex-boyfriend, ex-boyfriend
Tonight, you'll both be saying my name like I'm to blame and it's a shame
Ex, ex, oh, I'm not sorry
Her text won't, won't stop me
Tonight, I'm kissing my ex-best friend's ex-boyfriend, ex-boyfriend

[Outro]
And I'm to blame
Ex, ex, oh, I'm not sorry
Her text won't, won't stop me
Tonight, I'm kissing my ex-best friend's ex-boyfriend, ex-boyfriend