Complex sentence: She has been performing professionally since the age of 10, when she started opening for major Filipino artists such as Zsa Zsa Padilla, Rey Valera, Kuh Ledesma, Lani Misalucha, and Sarah Geronimo.
Split into simpler sentences: She has been performing professionally since the age of 10. At the age of 10, she started opening for major Filipino artists such as Zsa Zsa Padilla, Rey Valera, Kuh Ledesma, Lani Misalucha, and Sarah Geronimo.