How to delete songs from your iPhone on iTunes 11?

Ok so I set my iPhone to "Manually sync songs" in the past on earlier versions I was able to access my music that I put on the iPhone. But I can't find the section where it shows me all the songs I've synced on, I have synced some songs on there by accident and I don't want them on there, how do I get them off!

Lets make iTunes 11 look like iTunes 10 then it might be more familiar and easy to use:

It is the same, they have just hidden everything:

Follow me:

Open iTunes
Click on your music
click on the small screen icon to the top left
click show menu bar
click view
click show side bar

Now plug in your iphone and you will see it in the left side pain under devices
now lcik on your device and you can manually sync as before