Lenka的"Knock Knock"歌詞如下：
女：
Knock Knock
Who's there
I'm your neighbor
I'm just around the corner
男：
I know who you are
You don't have to hide
You don't have to pretend
It's okay to let it out
女：
Just knock knock
Don't be afraid
You don't have to worry
You're safe with me
男：
It's okay to feel lost
You don't have to hold it in
I won't judge you
I won't make it worse
合：
Just knock knock
And I will come to you
No need to be alone
When there's someone here for you
女：
Just knock knock
It's the little things
That mean the most to me
So come on, let it out
And I will hear you out
When you need someone around
男：
It's okay to feel small
You don't have to hold it in
I won't judge you
I won't make it worse
Just knock knock
And I will come to you
No need to be alone
When there's someone here for you
（重複）...and I will hear you out.
以上是"Knock Knock"的基本歌詞，可能會根據演唱版本和曲調微調。