Well, to answer the actual request, there are a few but they aren't usually the greatest of musical literature. As you'd expect. It's a "comic" word so it's used in comic songs. Love songs or better constructed (or snide) songs would discuss "her snowy breasts" or the like. Anyway, "boob" or "boobie" songs tend to be like:

Let me call you sweetheart; I'm in bed with you,
Let me pinch your boobies till they're black and blue.
Let me stroke your vulva till it's filled with goo,
Let's play hide the weenie up your old wazoo.


But sometimes you find one you actually know:

If all the young girls were diamonds and rubies,
I'd be a jeweler and polish their boobies.