Aquí tienes 7 de los mejores cepillos térmicos para conseguir un cabello liso, sedoso y voluminosos con secado.  

*(Alternative, slightly more natural phrasing in Spanish:)*  
Aquí tienes 7 cepillos térmicos ideales para un cabello liso, brillante y con volumen al secarlo.  

*(Note: "Blowout" doesn't have a direct one-word translation in Spanish, so it's often adapted as "secado con volumen" or "peinado con secador." The translation keeps the essence while sounding natural in Spanish.)*
Top 16 Diamantes Cultivados en Laboratorio para 2025: Desde Joyería Cotidiana hasta Anillos de Compromiso  

(Alternatively, depending on regional preference, "Top 16 Diamantes de Laboratorio para 2025" could also be used, as "cultivados en laboratorio" is more formal while "de laboratorio" is a common shorthand.)  

The translation maintains the original structure while adapting naturally to Spanish conventions. The clarification about regional variations ensures flexibility for different Spanish-speaking markets.