AVRIL LAVIGNE上海演唱会中和那个吉他手一起唱的那首歌叫什么名字？

In too deep 是SUM41的一首曲子 http://v.youku.com/v_show/id_XOTA3MTc4OA==.html

The faster we're falling,
We're stopping and stalling.
We're running in circles again
Just as things we're looking up
You said it wasn't good enough.
But still we're trying one more time.

Maybe we're just trying to hard.
When really it's closer than it is too far

Cause I'm in too deep, and I'm trying to keep,
Up above in my head, instead of going under.
Cause I'm in too deep, and I'm trying to keep,
Up above in my head, instead of going under.
Instead of going under.

Seems like each time
I'm with you I loose my mind,
Because I'm bending over backwards to relate.
It's one thing to complain
But when you're driving me in