tip of the tongue nightmare - what is Claire's ringtone?

It’s bugging me so much it actually hurts. On Modern Family, Claire has had the same ringtone for quite a while, and it’s really familiar to me, but I just can’t quite bring up the memory. I’m pretty sure it’s the theme music for some other sitcom from years ago, but I just… can’t… quite… gah!

And googling it, for me, just brings up generic ringtones for the show to download to my iPhone. Bleah.

What is her ringtone from?