What movie is this song from?

It's the weirdest thing. Every single morning when I wake up, I have a small part of a super random song stuck in my head. It's just one small line from a song, sometimes part of the chorus, but usually just a really random line. It could be a song a heard the day before, or a song I haven't heard for years. It's different every morning. Does this happen to anyone else?

Well this morning I woke up to "how ba-a-a-ad can I be? (Something something) comes naturally". I don't even know all the words, but it's stuck in me head! I'm pretty certain it's from a kid's movie, but I can't for the life of me remember which one. It's like on the tip of my tongue and it's driving me crazy.