If i upgrade my itunes to 9.0 does it delete?

Hi,
Um, i dont have a ipod anymore, but my friend wants me to download songs to her ipod & i tried but wheni plugged it into my laptop a message popped up saying that itunes needs to upgrade to 9.0 & i have a older version, So my question is, is that if i upgrade my itunes to 9.0 from the older version i have, will it delete the songs i have? because thats why i've never tried because that's what i was afraid of, & if they delete i'll be vvvvvvvvvvvvveeeeeerrrrrrrryyyyyyy sad because i have alot of songs. So will it ? Please help me anyone.