newborns respond well to music but that s not what a jaja song is really for. you re mommy s baby reporter: instead a celebration, a welcome, a benediction. welcome to our wonderful world. reporter: it is memorable and sara says they will show the tape to quinn in future years and they will keep the song going, which is great, because that is why he sings. what a wonderful world reporter: john donvan, abc news, washington. oh, yeah, oh, yeah. oh, that s nice. sweet. you like it for the babies, but you just told me, you re not into it if you re the mom? i think i would be annoyed. after you push out a kid, you re just like oh! that s what you re going to get if reena is delivering your baby, folks. no song from me but the needle. oh, my gosh. lots of drugs which sometimes helps in certain situations. announcer: this is abc s world news now, informing insomniacs for two decades. or two decades.