Giving son own Apple ID for new iPhone, will music be gone?

My son has used my Apple ID for years to download music onto his iPod. Now I'm getting him his first cell, an iPhone, and I think it's time he has his own Apple ID. However, will he lose all the songs he's downloaded over the years under my ID? Will he have to rebuy all of them for his iPhone since he will be using his own ID?

He can keep all of the songs you purchased on your Apple ID as long as they've been downloaded and added to iTunes on your computer. Set up his iPhone and click on the "Music" tab and make sure the checkbox labeled "Manually manage music and videos" is checked, so he can copy music from any computer he wants without losing the music he already has on his phone. You can copy all of the music you purchased onto his phone and they will play just fine even though he's using a different Apple ID.