I use an android but wife has iphone 4. Wanted to put a song into it. I was used to the previous itunes so i did what i thought i should have done:

plug phone in.

added the song to itunes library.

clicked on phone, clicked on music, clicked on sync music, clicked apply.

top action screen shows 7 steps ... prepare to back up, backing up - i didn't want to wait for it to back up 10gb of stuff so clicked the 'X' ... and then it didn't seem to do very much so i browsed the phone and shockingly the folders were empty! at that time the top action screen shows transferring purchases ... clicked X just prior to looking at the phone ...

now half the iphone music is greyed out, no more apps, thankfully photos still there.
but the itunes shows that phone data usage hasnt changed. still got 4gb apps.

i disconnected it and now has no idea what to do.

any ideas? (yeah i can painstakingly install the apps one by one i guess)