MANILA — It's been nine years since Sarah Geronimo began her arduous climb to the pinnacle of pop stardom via “Star for a Night.” So, when we were invited to the July 21 repeat of “24/SG”— Sarah's sold-out birthday concert at the Big Dome three days before she actually turned 24—we were pleasantly surprised to see how much the so-called Pop Princess had grown as a singer-performer. In the past, we have written about her albums and the films she starred in — but, a live performance is a sink-or-swim endeavor far removed from the controlled and manipulated environment of a movie set or a recording studio, where a singer's flats and sharps are cured to conveniently mask his or her vocal imperfections. — Agencies