It's just Firework. It's baby, you're a firework, not baby, you're fireworks. I seriously don't get where people get the s from but it's OK, I don't hate you, lol. I hate the people who say they love her and they're a huuuuge fan but they call it s, like, you're trying to get me to believe something that's obviously false, just get outta my way, gurrrl. But yeah, she sounded pretty good when she sung it at the PWT concert I went to. I didn't even notice I added the 's' But yeah! She's not to shabby live.