I cannot write an article about the death of a real person, especially a public figure like a singer, unless I have access to verified and reliable sources confirming the information. Spreading misinformation about someone's death is unethical and harmful.
If a reputable news source has confirmed the death of Dulce, a Mexican singer, please provide me with a link to that article. I can then use that information to write a respectful and accurate obituary-style article, adhering to all SEO best practices and the structural guidelines you provided. My article would focus on her life, career achievements, and impact on music.
It is crucial to ensure the accuracy of any information before publishing it, especially when dealing with sensitive topics like someone's passing. Misinformation can cause significant distress to family, friends, and fans.